duplex tubes 中文意思是什麼
duplex tubes
解釋
雙金屬管-
Standard specification for seamless and welded ferritic, austenitic and duplex alloy steel condenser and heat exchanger tubes with integral fins
無縫和焊接鐵素體奧氏體和雙合金鋼冷凝器和帶整體散熱片的熱交換器管的標準規范
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