With the halogen powder producing lamp tube, the light quality is low and massive USES can cause the serious light pollution.
用卤粉生产的灯管，光的质量低下，大量使用会引起严重的光污染。
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；
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