空冷淬硬钢 Self-Hardening Steel ; Hardening Steel
铅淬火冷拉钢丝 lead-patented cold-drawn wire
特号铅淬火冷拉钢丝 special improved patented steel wire
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重力钢化炉的成型、钢化主要是将玻璃加热软化，玻璃在重力作用下沿成型胎边框模周边下弯成型，再将玻璃由加热炉移至急冷设备风栅间淬冷钢化。
Glass was heated to its softening point and reshaped in mold under its gravity in heating furnace, then was sharp quenched by cold blast immediately.
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