英语动词UNDERDRAIN的变化形式
PRESENT
Present
I underdrain
you underdrain
he/she/it underdrains
we underdrain
you underdrain
they underdrain
Present continuous
I am underdraining
you are underdraining
he/she/it is underdraining
we are underdraining
you are underdraining
they are underdraining
Present perfect
I have underdrained
you have underdrained
he/she/it has underdrained
we have underdrained
you have underdrained
they have underdrained
Present perfect continuous
I have been underdraining
you have been underdraining
he/she/it has been underdraining
we have been underdraining
you have been underdraining
they have been underdraining
PAST
Past
I underdrained
you underdrained
he/she/it underdrained
we underdrained
you underdrained
they underdrained
Past continuous
I was underdraining
you were underdraining
he/she/it was underdraining
we were underdraining
you were underdraining
they were underdraining
Past perfect
I had underdrained
you had underdrained
he/she/it had underdrained
we had underdrained
you had underdrained
they had underdrained
Past perfect continuous
I had been underdraining
you had been underdraining
he/she/it had been underdraining
we had been underdraining
you had been underdraining
they had been underdraining
FUTURE
Future
I will underdrain
you will underdrain
he/she/it will underdrain
we will underdrain
you will underdrain
they will underdrain
Future continuous
I will be underdraining
you will be underdraining
he/she/it will be underdraining
we will be underdraining
you will be underdraining
they will be underdraining
Future perfect
I will have underdrained
you will have underdrained
he/she/it will have underdrained
we will have underdrained
you will have underdrained
they will have underdrained
Future perfect continuous
I will have been underdraining
you will have been underdraining
he/she/it will have been underdraining
we will have been underdraining
you will have been underdraining
they will have been underdraining
CONDITIONAL
Conditional
I would underdrain
you would underdrain
he/she/it would underdrain
we would underdrain
you would underdrain
they would underdrain
Conditional continuous
I would be underdraining
you would be underdraining
he/she/it would be underdraining
we would be underdraining
you would be underdraining
they would be underdraining
Conditional perfect
I would have underdrain
you would have underdrain
he/she/it would have underdrain
we would have underdrain
you would have underdrain
they would have underdrain
Conditional perfect continuous
I would have been underdraining
you would have been underdraining
he/she/it would have been underdraining
we would have been underdraining
you would have been underdraining
they would have been underdraining
IMPERATIVE
Imperative
you underdrain
we let´s underdrain
you underdrain
NONFINITE VERB FORMS
Past participle
underdrained
Present Participle
underdraining
与 «UNDERDRAIN»相关的英语书籍
在以下的参考文献中发现
underdrain的用法。与
underdrain相关的书籍以及同一来源的简短摘要提供其在 英语文献中的使用情境。
1
Water Treatment Processes: Simple Options
The underdrain must be specially designed to produce low headloss. This is
feasible because the filters are completely open at the bottom, and the
washwater flow rate is, therefore, very low. This system can be used for both
single and ...
S. Vigneswaran, C. Visvanathan, 1995
2
Handbook of Public Water Systems
The underdrain design must be capable of uniformly distributing backwash water
and air scour across the filter bed and uniformly collecting filtered water over the
entire area of the filter. There are three categories of filter underdrain systems ...
HDR Engineering Inc., 2002
3
Filter Troubleshooting and Design Handbook
The purpose of an underdrain is to collect filtered effluent that has passed down
through the granular media and to evenly distribute the incoming backwash
water used to clean the media. Although the purpose of the system is filtration,
the ...
Richard P. Beverly, Richard P. Beverly, PE, WRE, WTIII, 2011
4
Integrated Design and Operation of Water Treatment Facilities
Filter underdrain systems differ primarily in their filter washing design and the
types of filter required by each system. Most municipalities in the United States
use large filters and operate with a wide variety of underdrain systems, ranging
from ...
for the water to be treated, poor hydraulic design, use of unsuitable material, bad
installation in particular of the underdrain system and mal-operation. These result
in short filter runs, inefficient filter cleaning (dirty filters), very high starting head ...
Ratnayaka, Don D. Ratnayaka, Malcolm J. Brandt, 2009
6
Activated Carbon: Solutions for Improving Water Quality
Comparison of GAC underdrain alternatives Underdrain Alternatives Parameter
Wedgewire Plastic Block Folded Plate Example manufacturer Johnson Screens®
Leopold AWI Model Triton® SS*Vee—Wire Universal Blocklwith Phoenix SS ...
Zaid K. Chowdhury, Garret P. Westerhoff, 2012
7
Achieving Nutrient and Sediment Reduction Goals in the ...
Urban BMPs How Credited Septic connections Systems change Septic
denitrification Efficiency Septic pumping Efficiency C/D soils, underdrain
Efficiency Bioretention A/B soils, underdrain Efficiency A/B soils, no underdrain
Efficiency ...
Committee on the Evaluation of Chesapeake Bay Program Implementation for Nutrient Reduction to Improve Water Quality, Water Science and Technology Board, Board on Environmental Studies and Toxicology, 2011
In the case of underground water, underdrain is made inside the soil. The type of
underdrain depends upon the way grooves are made (Takagi, 1952) and Hg 6 3
Types of ^^^^ (Takagi) the materials used for drain. They [Insertions :\.
Kichisaburō Minamizawa, 1997
9
National Directory of Commodity Specifications: Classified ...
Wks., Item R—3, 1924: Pipe underdrain (shall consist of drain tile or vitrified pipe,
as indicated on the plans or in the approximate estimate). Pennsylvania, State
Highway Dept., Form 408, 1922: Tile outlets for underdrains; tile underdrain and
...
United States. National Bureau of Standards, Addams Stratton McAllister, 1925
10
Low Impact Development: New and Continuing Applications
Data confirmed that a substantial fraction of flow did not discharge through the
underdrain. In-situ testing of the subgrade measured permeability at 4 x 10'9 rn/s
which suggests clay soils into which water flow will be negligible, particularly with
...
包含词语«UNDERDRAIN»的新条目
找出国内和国际出版社所讨论的内容，以及词语
underdrain在以下新条目的上下文中是如何使用的。
Sunday Morning Update on East Hagatna Work
(July 26 - Tamuning) Yesterday, DPW crews installed 55 feet of underdrain pipe, which is about 60% of the work. The crews also backfilled excavation that ... «KUAM.com, 七月 15»
Campbell Road in West Deer reopens Monday
Crews excavated the entire roadway and installed a base, underdrain and inlet to control water in the area, then repaved the entire area, Sheldon said. «Tribune-Review, 七月 15»
Road work on deck in Duncan
... June 23 meeting because council members determined the contract with WW Builders should include construction of a pipe underdrain and related pavement ... «Duncan Banner, 七月 15»
Woodstock District 200 Board to Vote on Turf Bids
Those bids, however, would only cover construction of the sub-grade for the synthetic turf field, installation of storm sewer pipe and underdrain systems, ... «Woodstock Independent, 七月 15»
Commissioners to attend meeting on failed under-drain
SBCC underdrain. MITCHELL, Neb. -. The Scotts Bluff County Commissioners agreed to meet with other entities in the area to discuss a failed under-drain. «Kotatv, 五月 15»
Severn Trent to sell Water Purification business to Industrie De Nora
A Severn Trent Services TETRA LP Block filter underdrain system has been specified for a 240 mgd water treatment plant in Kansas City, Missouri, USA by the ... «Filtration + Separation, 五月 15»
Woodstock filtration plant upgrade's estimated cost rises to $2.5M
In June, 2014, the Common Council had authorized $1,730,000 for the project that included the replacement of underdrains at the filtration plant in Woodstock. «The Daily Freeman, 五月 15»
Xylem Wins Contract To Double Capacity Of Water Treatment …
Xylem will provide its market-leading Leopold Clari-DAFdissolved air flotation system and Leopold Type S underdrain solutions for the treatment works' ... «Water Online, 三月 15»
Hurricane damaged island helped by US water firm
A Severn Trent Services TETRA LP Block filter underdrain system has been specified for a 240 mgd water treatment plant in Kansas City, Missouri, USA by the ... «Filtration + Separation, 三月 15»
Permeable Design Pro Software Version 2.0 Released
Based on user inputs, drawing outputs can include an underdrain, geotextile, and an impermeable liner if no infiltration into the soil subgrade is desired. «PR Web, 一月 15»
