... low loss,2 the unique pressure ring (clamp), install,3 the unique C type rubber sealing ring, guarantee the ... install and maintain, greatly reduce the high cost frit,3 PaiSuan, can be used for chemical resistance, corrosion ... sewage drainage (corrupt) system,2 Bridges, highway drainage system,3 in public places such as hotels, restaurants, shops, ... /10 2:35:59 HDPE coupling hdpe coupler pe coupling