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微阻緩閉式止回閥HH44H/XThe micro resistance slow close check valve HH44H/X公稱通徑 Nominal diameter: DN50~DN 1200公稱壓力 Nominal pressure: PN0.6~1.6MPa適用介質 Applicable medium:水、油、氣等 Water,oil,steam etc適用溫度 Applicable temperature: -45℃- 450℃