In machinery space the valves pipes should be .A.arranged as close to each other as poss

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In machinery space, the valves, pipes should be .

A.arranged as close to each other as possible to save space

B.arranged far away from each other for convenient operation

C.be fixed or clamped to avoid vibration

D.kept easy removable as to convenient repairing work

请帮忙给出正确答案和分析,谢谢!

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