GB/T 34391-2017石油、石化和天然气工业用往复泵国家标准
英文:Reciprocating positive displacement pump for petroleum, petrochemical and natural gas industries GB/T 34391-2017介绍: 国...
英文:Reciprocating positive displacement pump for petroleum, petrochemical and natural gas industries GB/T 34391-2017介绍: 国...