单选题管路中截止阀、阀止止回阀拆卸后安装或更换后安装时，应注意阀的安装方向（）。A低进高出B高进低出C阀上箭头所指方向DA和C
单选题
管路中截止阀、阀止止回阀拆卸后安装或更换后安装时，应注意阀的安装方向（）。
A
低进高出
B
高进低出
C
阀上箭头所指方向
D
A和C
参考解析
解析：
暂无解析
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