压力等级：适用于公称压力不大于 1.6MPa Pressure grade : suitable for the nominal preSSure not Iarger than 1.6MPa 规格型号 : dn50mm ? dn355mm Specification and mode ! : dn 50mm ? dn 355mm
压力等级：适用于公称压力不大于1.6MPaPressuregrade:suitableforthenominalpreSSurenotIargerthan1.6MPa规格型号:dn50mm?dn355mmSpecificationandmode!:dn
压力等级：适用于公称压力不大于 1.6MPa Pressure grade : suitable for the nominal preSSure not Iarger than 1.6MPa 规格型号 : dn50mm ? dn355mm Specification and mode ! : dn 50mm ? dn 355mm
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