单项选择题
(A)流量报警; (B)流速报警; (C)压力报警; (D)压力测量
A.1°~8°B.2°~8°C.3°~10°D.5°~10°
(A)位移; (B)重量; (C)体积; (D)面积
(A)负压; (B)大气压; (C)表压; (D)绝对压力
微信扫一扫,加关注免费搜题