单选题制冷压缩机吸气腔最低处所开的通轴箱的孔道，作用不包括（）。A让吸气带回的滑油返回曲轴箱B必要时抽空曲轴箱C抽走漏入曲轴箱的制冷剂D减少吸气压力波动
单选题
制冷压缩机吸气腔最低处所开的通轴箱的孔道，作用不包括（）。
A
让吸气带回的滑油返回曲轴箱
B
必要时抽空曲轴箱
C
抽走漏入曲轴箱的制冷剂
D
减少吸气压力波动
参考解析
解析：
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