A vacuum is initially established in the first and second stages of a low pressure evaporator by the use of （）<br>A:vacuum drag from the auxiliary condensate system<br>B:individual vacuum pumps<br>C:a single non-condensing air ejector<br>D:a two stage air ejector

A vacuum is initially established in the first and second stages of a low pressure evaporator by the use of （）
A:vacuum drag from the auxiliary condensate system
B:individual vacuum pumps
C:a single non-condensing air ejector
D:a two stage air ejector

出自：海船船员证

提示：
同一【IP】的非会员用户每天可免费获取10次答案

收藏本站【zk.995w.com】，下次访问不迷路

本站试题总数:【10245403】个 (题库试题定时更新)