secondary raw material 中文意思是什麼
secondary raw material
解釋
次生原料-
By using secondary fibers, fiber raw material can be saved and the environment pollution caused by paper - making industry can be relieved, but there are still many unsolved problems in the recycle process
摘要二次纖維的開發利用可以節約纖維原料,減輕造紙工業對環境的污染,但是在其回用過程中仍然存在很多期待解決的問題。 -
Zinc and zinc alloys - secondary raw material
鋅和鋅合金.二次原料 -
Zinc and zinc alloys - secondary raw material ; german version en 14290 : 2004
鋅和鋅合金.二次原料
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