单选题（） is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.AAn air receiverBAn operating valveCAn automatic valveDAn air distributor
单选题
（） is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.
A
An air receiver
B
An operating valve
C
An automatic valve
D
An air distributor
参考解析
解析：
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相关考题：
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_______is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.A.An air receiverB.An operating valveC.An automatic valveD.An air distributor
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