基本解释[機械工程]無鉻鞣劑英汉例句雙語例句In addition, chromium resource in China is very limit, so the research of chrome-free and less-chrome tanning agent are very imperative.此外我國的鉻資源也極爲有限，因此研究少鉻和無鉻鞣劑勢在必行。chrome-free tanning agent更多例句专业释义機械工程無鉻鞣劑