Designate the valve size and the complete catalog number, including prefix and suffix letters, when applicable, to identify regular cataloged items as described on the following pages.

• 在订购时,请指定阀门通径和完整的产品规格型号,包括前缀和后缀,有关规格型号的含义请参阅下列网页中描述的常规项目及其说明。