单选题Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?（）AThe reservoir would become vapor boundBThe valve would be placed in hydraulic lockCThe spring loaded relief ports would openDThe buffering chambers would be unable to function
单选题
Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?（）
A
The reservoir would become vapor bound
B
The valve would be placed in hydraulic lock
C
The spring loaded relief ports would open
D
The buffering chambers would be unable to function
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