全套管道孔板、阀门、法兰及反法兰、紧固件及其它所有附件，所有放水、放气阀门及安全阀。
Full set of pipe orifice, valves, flanges and counter flanges, fasteners and all other attachments, all water release valves, gas release valves and safety valves.
计量孔板由铸铁法兰，密封垫，孔板（铸铁或不锈钢）组成。
They are built with cast iron flanges, gaskets and orifice plates (either mild steel or stainless).
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