勿需安装
No installation required
以上为机器翻译结果，长、整句建议使用 人工翻译 。
压盖式伸缩接头：该产品适用于两边与管子插接、勿需焊接，结构合理，密封，安装快速方便。
Covering Sleeve: The way of using this product is to joint with the tube on both sides , no welding. It has a reasonable structure, and is sealed. it is very easy to install.
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模块下移
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