若条件允许，对一个矿井内的管路应尽量统一管材，以便维修、改换备件。
If conditions allow, for a mine in the pipeline should be unified pipe, for maintenance, replacement of spare parts.
喷针数量少，水、气管路短，便于清洗和更换备件。
It has small quantity of needles, short water, air pipe, is easy for cleaning and replacement.
喷针数量少，水、气管路短，便于清洗和更换备件。
It has small quantity of needles, short water, air pipe, is easy for cleaning and replacement.
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