NSEN muaj ob txoj kev taw qhia thiab uni-directional qauv rau cov neeg siv khoom, nrog kev sib txuas Wafer hom, Ob chav flange hom, Lug hom thiab Butt Weld hom.Txhawm rau ua kom yooj yim rau koj xaiv lub valve, tus kws tshaj lij txoj haujlwm yuav raug muab tom qab koj xa peb cov ntsiab lus ua haujlwm.Txhawm rau paub txog peb qhov kev pabcuam ncaj ncees, xa koj cov lus nug tam sim no!