sewage manholes
... square manholes 方形人孔 sewage manholes 塑料入孔 arch brick for manholes 入孔拱砖 ...
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将螺钉连结工件直接拧入塑料销塞的孔内，销塞受力膨胀，与墙体牢固结合。
Will link directly into the screw plastic pin plug twist the hole, pin plug stress, and wall body firmly with inflation.
youdao
暗装的旋转把手，旋入金属薄板和塑料电箱的两孔里。
Flush mounted swing-handle, screwed into 2 holes for sheet metal and plastic enclosures.
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