单项选择题
A.main stem stop valve B.auxiliary steam stop valve C.feed check or control valve D.blow down valve
The（） is a smaller valve fitted in the auxiliary steam ...
单项选择题The（） is a smaller valve fitted in the auxiliary steam supply line, and is usually of the non-return type.
The（）is fitted in the main steam supply line and is usu...
单项选择题The（）is fitted in the main steam supply line and is usually of the non-return type.
A.main steam stop valve B.auxiliary steam stop valve C.feed check or control valve D.blow down valve
The lifting pressure of （） is set in the presence of a ...
单项选择题The lifting pressure of （） is set in the presence of a Surveyor it is locked and cannot be changed.
A.fuel valves of main engine B.injector pump of main engine C.safety valves of marine boiler D.safety valves of a reciprocating pump
