Air cocks usually positioned at the () in a circulating system is used to get rid of the air in the system.
时间:2019-04-14 04:55:20 关键词:the,at,circulatingAir cocks, usually positioned at the () in a circulating system, is used to get rid of the air in the system.
A.bending joint
B.expansion tank
C.weld
D.the highest point
答案解析
D
举一反三