pd 5500造句

造句与例句手机版

PD 5500 was formerly a widely used British Standard known as "'BS 5500 "', but was withdrawn from the list of British Standards because it was not harmonized with the Europeran " Pressure Equipment Directive " ( 97 / 23 / EC ).
It's difficult to see pd 5500 in a sentence. 用pd 5500造句挺难的

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