treatment before plating镀金: gild前: front处理: deal or cope with铝及铝合金前处理: chemistry for plating on al & al alloy前处理: initial treatment; preproce ing; preprocessing; pretreatment下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:镀金前处理,即可在微信中查询翻译