美标旋启式止回阀H44H-300LB 18#DN450

ANSIB16.5标准止回阀H44H-300LB 1#DN25

美标API598止回阀H44H-300LB 1- 1/4#DN32

美标大口径止回阀H44H-300LB 6#DN150

美标300LB止回阀H44H-300LB 20#DN500

美标升降式止回阀H44H-300LB 3/4#DN20

美标API止回阀H44H-150LB 16#DN400

国标旋启式止回阀H44H-16C-DN32

DN200止回阀H44H-16C-DN200