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介绍HBM－3000型门式布氏硬度计的电器控制系统的电器原理及手动与自动操作程序以及在调整与修理过程中发现的问题和解决的方法
Introduction HBM-3000 type door Brinell hardness of the electrical control system electrical principles and manual and automatic procedures and in the process of adjustment and repair found problems and solutions