Vavu yoponyera imaponyedwa mu valavu, giredi yamagetsi yoponyera ma valve ndi yotsika kwambiri (monga PN16, PN25, PN40, koma palinso kuthamanga kwambiri, kungakhale kwa 1500LD, 2500LB), zambiri zamtundu ndizoposa DN50.Ma valve opangira magetsi amapangidwa.Amagwiritsidwa ntchito kwambiri pamapaipi apamwamba ...
Werengani zambiri