The outside diameter of the pipe is （） the diameter of the bore of the piston rod, the result being that an annular space formed between the piston rod and the pipe.

[单选题]英语PIPE指（）A .放大器B .铁管C .气管D .通气孔

[名词解释] 下管pipe sinking

[单选题]Itseemsoil________fromthispipeforsometime.We’llhavetotakethemachineaparttoputitright.A．)hadleakedB)isleakingC)leakedD)hasbeenleaking

[单选题]（） at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.A . A relief valveB . An alarmC . A pressure gaugeD . A non-maim valve

[单选题]“Before disconnecting the oil pipe, would you flush the oil retained in the pipe?” asked the oil barge owner （）A . by using of fresh waterB . with compressed airC . by using of sea waterD . with chemical compound

[名词解释] 1ead- pipe rigidity

[单选题]The diameter of the gravity disc is too big It causes oil to flow through the water outlet We changed the disc and no （） is found in the water outlet.A . waterB . oilC . scaleD . ridge

[单选题]A( )system placed between the company network and the outside world may lim

[名词解释] 末端治理（End-of-Pipe Control）

[单选题]A hot air start pipe indicates that there is （）.A . inefficient coolingB . a leaking air start valveC . a clogged drain valveD . a leaking air bottle