A、A.safety valve
B、B.blow down valve
C、C.scum valve
D、D.feed check valve
更多“Impurities from the boiler water surface can be removed through the （）.”相关的问题
A、the solid impurities of large particle B、the solid impurities of fine particle C、the water content D、both water and solid impurities
A、completely drain the boiler in an emergency B、prevent sludge from forming in the drum C、remove floating impurities from the boiler water surface D、remove settled solids from the water drum
A、remove suspended and precipitated solids from the boiler water B、completely drain the boiler in an emergency situation C、prevent hardened scale deposits in the water drum D、remove floating impurities from the oily water surface
A、allow impurities to settle out of the fuel B、allow air to escape from the fuel C、make fuel available for immediate use D、all of the above
A、contaminating water B、contaminated additives C、contaminated fuel D、contaminating impurities
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