H44H-150LBH44H-150高温蒸汽碳钢美标磅级法兰止回阀
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H44H-150LBH44H-150高温蒸汽碳钢美标磅级法兰止回阀
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PVC止回阀UPVC球型塑料立式止水阀逆止阀
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H64Y-16CH64Y-16高温高压电站止回阀焊接自密封铸钢
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H44H-40CH44H-16C高温高压蒸汽导热油铸铁法兰止回阀
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H41H-16CH41H-16高温蒸汽铸铁升降式法兰单向止回阀
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H41H-16CH41H-16耐高温碳钢法兰轴流式贯流式止回阀
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H14W-16PH14W-16不锈钢卧式止回阀丝扣旋启式内螺纹
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H12W-16PH12W不锈钢立式止回阀/丝扣单向阀内螺纹
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H41-40PD DH44F-40PDH61Y不锈钢低温止回阀法兰单向阀逆止阀
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GL41H-16PGL41H-16不锈钢Y型法兰过滤器专用止回阀
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H71WH71不锈钢304对夹式止回阀单向阀止逆阀
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H41W-16PH41W法兰不锈钢防止倒流反转升降式止回阀
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