Primer is necessary to penetrate and soften both pipe and fitting socket surfaces in order for the solvent cement to properly bond.
有必要采用底漆来渗透和软化管道和管件承插端口表面，使得液状粘固剂能够完全粘结。
The pipe fitting is divided into a socket part (1) of two ends connected with a tube and a central bending part (2).
将管件分成与管子连接的两端的承插部分（1）和中间的弯曲部分（2）。
The pipe fitting is divided into a socket part (1) of two ends connected with a tube and a central bending part (2).
将管件分成与管子连接的两端的承插部分（1）和中间的弯曲部分（2）。
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