Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an().
A、Orsat apparatus
B、flame safety lamp
C、Halide torch
D、combustible gas indicator
A、Orsat apparatus
B、flame safety lamp
C、Halide torch
D、combustible gas indicator
A、A.医护人员手培养≤1fu/m3 B、B.医护人员手培养≤2fu/m3 C、C.医护人员手培养≤3fu/m3 D、D.医护人员手培养≤4fu/m3 E、E.医护人员手培养≤5fu/m3
A、before you enter the water B、after you enter the water C、after one hour in the water D、after you notice that your suit is losing buoyancy