The invention relates to sidewall stabilizer having protective function on sidewall in oil drilling process, comprising the following components by weight percentage: 30%-50% of bentonite;
本发明涉及一种在石油钻井过程中对井壁起保护作用的井壁稳定剂，按重量百分比该稳 定剂由以下组分组成：膨润土30％-50％；
The invention discloses a leadless and no-halogen tonal, comprising following components with percent by weight: alloy powder 80-98 and welding flux 2-20;
本发明公开了一种无铅无卤素锡焊膏，包括以下重量份组分：合金粉 80-98，助焊剂2-20；
The invention relates to a surface treatment method of plastic components, comprising the following steps: providing an inkjet device housing etching solution inside;
本发明涉及一种塑胶元件表面处理方法，该方法包括：提供一喷墨装置， 该喷墨装置内收容有蚀刻溶液；
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