Perfect sealing system to create excellent sealing effect, prevent water invasion, keep indoor dry.
绝佳的密封系统打造优异的密封效果，杜绝水汽入侵，让室内保持干爽。
The hole sealing agent has the advantages of simple construction, low difficulty to master, good sealing effect, safe use and low cost, etc.
本发明具有施工简单、易于掌握、封堵效果好、使用安全等优点，且成本低廉。
The butterfly valve has the advantages of small volume, low cost, little abrasion, long service life, good sealing effect, high reliability, convenient maintenance and bidirectional sealing.
这种蝶阀的体积小、成本低、磨损少、寿命长、密封性好、可靠性高、维修方便，并具有双向密封。
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