Safety system core technology: self hardening sand core equipment, hot core and core machine, coated sand core machine, cold core and core machine.
安制芯工艺分：自硬砂制芯设备、热芯合制芯机、覆膜砂制芯机、冷芯合制芯机。
2
Hot bake-hardening steel is the latest developed new generation of auto-motive steel.
热轧烘烤硬化钢是最新开发的新一代汽车用钢。
3
The principal problems with respect to roll working life are cracking at the surface of roll for hot-rolling and that effective zone of quench-hardening of roll for cold-rolling is too narrow.