問題詳情
18. The type of traps is suited at the steam piping of high pressure.And the trap consists of a disc and set ring. Which trap is abovedescription?
(A) Magnetic traps
(B) Mechanical traps
(C) Thermodynamic traps
(D) Vacuum traps
參考答案
答案：C
難度：適中0.676471
統計：A(3),B(5),C(23),D(3),E(0)