... raw material, low loss,2 the unique pressure ring (clamp), install,3 the unique C type rubber sealing ring, guarantee the ... design, and economical, groove type pipe beautiful outlook, easy to install and maintain, greatly reduce the high cost frit,3 PaiSuan ... of acid wastewater discharge laboratory,6 alternative drainage iron pipe.Update Date:2010/6/10 2:36:44 HDPE male union ...