D64Y,D64H电站止回阀
H74H-16C对夹圆片式止..
H76H-16P不锈钢对夹式..
H63Y/H83Y高压角式止..
H14W-16P/R不锈钢内..
H42W-16P不锈钢立式止..
H61Y型高压升降式止回阀