上海重型机床厂的一台重型龙门刨铣床 ,不久前经过北京如意技贸中心 (原北京精密机床修理总站 )进行数控化改造 ,起死回生 ,而且提高了精度 ,重新为企业创造效益。此举创造了我国大型龙门铣床数控改造的第一个成功范例。该设备是上重厂从保加利亚购买的原苏联 1986年产的普通龙 A heavy duty planer milling machine from Shanghai Heavy Machine Tool Works recently passed CNC Renovation of Beijing Ruyi Technology & Trade Center (formerly Beijing Precision Machine Tool Repair Center) to revive the deadline and raise the precision and re-create benefits for the enterprise. This move has created the first successful example of CNC retrofitting of large gantry milling machines in China. The equipment was purchased from Bulgaria in 1986 by the former Soviet Union