允许对校准块表面镀铬或无电镀镍。
It is permissible to chromium plate or electroless nickel plate the surfaces of the block.
在无电镀镍浴中因次磷酸根氧化而产生的亚磷酸根离子，可以通过碱金属或碱土金属阳离子如钙的沉淀作用而去除。
Orthophosphite ions produced by oxidation of hypophosphite in an electroless nickel plating bath can be removed by precipitation with an alkali metal or alkaline earth metal cation such as calcium.
批发采购电镀助剂-供应666无铅无镍光亮厚白铜锡（电镀助剂）批发…
The lead-free nickel free white and bright nickel substitute plating process…bright nickel substitute tin salt 30g 666 lead-free nickel free white and …
批发采购电镀助剂-供应666无铅无镍光亮厚白铜锡（电镀助剂）批发…
The lead-free nickel free white and bright nickel substitute plating process…bright nickel substitute tin salt 30g 666 lead-free nickel free white and …
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