What is the "释压调节器"?
A.shutoff valve;gage;
B.pressure reducing regulator;
C.diluter demand regulator;
D.pressure controller;
正确答案是C
What is the "释压调节器"?
A.shutoff valve;gage;
B.pressure reducing regulator;
C.diluter demand regulator;
D.pressure controller;
正确答案是C