21. Which of the followings could not cause over pressure of cargo tank of tanker ?
(A) Loading rate too high.
(B) Discharging rate too high.
(C) Seizure of the venting valve.
(D) Incorrect setting of the tank’s vapor isolating valve.
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統計: A(50), B(319), C(131), D(76), E(0) #1558474
統計: A(50), B(319), C(131), D(76), E(0) #1558474