单项选择题
A.distilling condenser
B.salt water feed heater
C.distillate cooler
D.flash chamber
单项选择题 The second stage feed-water temperature and shell absolute pressure in a multistage, flash type, distilling plant is （）
单项选择题 The efficiency of a flash type evaporator can be increased by（）
单项选择题 In some modern large diesel engines, which of the following is used as the support for the main bearings?（）