Bottom blow valves are installed on auxiliary water-tube boilers to ___________.A.complete

职业资格 已帮助 人

Bottom blow valves are installed on auxiliary water-tube boilers to ___________.

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

请帮忙给出正确答案和分析,谢谢!

热搜:英译汉:Installment,正确的翻译为()。