needle cast 中文意思是什麼
needle cast
解釋
落葉病-
Gate valve, ball valve, butterfly valve, needle valve and cock valve. cast iron valve, cast steel valve, and stainless steel valve etc
閥門鑄鐵、鑄鋼、不銹鋼等系列閘閥、球閥、蝶閥、針閥、旋塞閥
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