利用焊接方法对机械零件进行的防磨、防蚀覆盖或者补修的技术统称为维修焊接技术。 要估价一个国家的工业产量,不能单从这个国家的机器数量及工人的数量来确定,还应从工人及机器的使用效率来考核。每当一个机 The technology of wear-proof, corrosion-proof covering or repair of mechanical parts by using the welding method is collectively referred to as maintenance welding technology. To appraise the industrial output of a country, it cannot be determined solely from the number of machines and the number of workers in the country, but also from the use efficiency of workers and machines. Whenever a machine