The practical norm is a social norm that guides and rules the subjects practical activities.
实践规范是对实践主体的现实实践活动予以示导、制约的社会规范。
According to the rule of "main task is repair, economic practical", using Sn-Bi alloy gas welding repairing method to repairr B2012A type planer guides, this method simple and quick.
本着“以修为主、经济实用”的原则，采用“锡铋合金气焊”的方法修复B2012A型龙门刨床大面积咬伤的导轨，操作简单，修复迅速，经使用表明，修复好的设备性能可靠，运行状况良好。
According to the rule of "main task is repair, economic practical", using Sn-Bi alloy gas welding repairing method to repairr B2012A type planer guides, this method simple and quick.
本着“以修为主、经济实用”的原则，采用“锡铋合金气焊”的方法修复B2012A型龙门刨床大面积咬伤的导轨，操作简单，修复迅速，经使用表明，修复好的设备性能可靠，运行状况良好。
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