并探讨管件的成型方式与排水系统之影响因子。
And discusses the fitting to take shape influence factor the way and the drainage system.
为了焊接方便，管件与被连接的管子的钢种是相同的。
In order to convenient welding, pipe and the connecting pipe steel is the same.
为了焊接方便，管件与被连接的管子的钢种是相同的。
In order to convenient welding, pipe and the connecting pipe steel is the same.
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