不銹鋼美標球閥Q41F-300LB不銹鋼美標法蘭球閥Q41Y-150LB不銹鋼304美標球閥Q41F-300LBP不銹鋼304美標法蘭球閥Q41Y-150LBP不銹鋼美標316球閥Q41F-300LBR不銹鋼美標316法蘭球閥Q41Y-150LBR不銹鋼316L美標球閥Q41F-300LBRL不銹鋼316L美標法蘭球閥Q41Y-150LBRL美標磅級球閥截斷或接通介質。