22. 下列何種閥不適合做為調節流量之用途?
(A)閘閥
(B)球閥
(C)角閥
(D)針閥
答案:登入後查看
統計: A(15), B(1), C(6), D(2), E(0) #1360492
統計: A(15), B(1), C(6), D(2), E(0) #1360492