千焊 soldering and brazing 工业炉砌体 brickwork of industrial furnace 工业炉排烟系统 fume dischange system for industrial furnace 工业炉预热器 preheater for industrial furnace 工业炉燃烧装置 combustion device for industrial furnace 井式炉 vertical pit furnace 少无切削加工 chipless forming 手工电弧焊 shielded metal arc welding 水下切割 underwater cutting 水下焊 underwater welding 水压机 hydraulic forging press 火焰淬火 flame hardening 可控气氛 controlled atmosphere 可锻铸铁 malleable cast iron 台车式炉 car-bottom type furnace 平锻机 horizontal forging and upsetting machine 正火 normalizing 再生砂 reclaimed sand 回火 tempering 成形轧制 forming rolling 自由锻 open die forging 低压铸造 low-pressure casting 冷压焊 cold pressure welding 冷鐓 cold upsetting 形变热处理 thermomechanical treatment 冲天炉 cupola 拉深 deep drawing 拋丸机 shot blasting machine 泥型铸造 clay mold casting 芯砂 core sand 芯盒 core bo