Trivalent chromium passivation shall be used unless written exception or specification update provided.
Trivalent chromium passivation shall be used unless written exception or specification update provided.
要应用三价铬的钝化，有书面指出的例外或规格更新时除外。
Trivalent chromium passivation shall be used unless written exception or specification update provided.
要应用三价铬的钝化，有书面指出的例外或规格更新时除外。