Others, however, are reluctant to omit the tonal qualities of the two components because they have been used routinely over years and readers expect them.
但是也有另外一些人很不愿意省掉这两个部分因为他们已经象惯例一样用了很多年，而且读者也习惯了这种方式。
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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