The waterproof layer of the lap joint should stick (welding) firm, tight sealing, no distortion, fold, curling and blister defects.

卷材屋顶防水层的搭接缝应粘(焊)结牢固，密封精密，不得有扭曲、皱折、翘边和起泡等缺陷。

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The sealing shear box is designed especially to meet the purpose that seepage water of high-pressure flows along appointed path of joint face during the test while no leakage will happen.

经特殊设计的渗流剪切盒可以保证节理在进行剪切渗流试验中，一定压力的渗流水会沿指定路径流过节理面，且不发生渗漏。

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