testing for internal quality 中文意思是什麼
testing for internal quality
解釋
內部質量檢查-
Valves and fittings of spheroidal cast iron for untreated and potable water ; corrosion protection by internal enamelling ; quality requirements, testing
未處理水和可飲用水用的球墨鑄鐵管閥和管接頭.內部塗
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