● 全机采用GB-HT300树脂沙造型铸件，经回火处理和自然时效处理消除内应力。 Whole parts use GB-HT300 resin sand casting component, by tempering and natural aging to eliminate internal stress. ● 内藏式配重：配重附导杆，上下移动时配重不晃动。 Built-in counterweight: counterweight with guide rod, won’t be shaking when moving up and down. ● 各滑动面使用自动润滑泵装置，确保机床的使用寿命。 The sliding surface is with automatic lubrication pump device, to ensure the service life of the machine. ● 全密封钣金，排屑不外露。 Sealed sheet metal and excretion inside the machine.