hardening and tempering

短語詞組

短語

• hardening g and tempering 調(diào)質(zhì)
• oil hardening and tempering 油回火
• Hardening and Tempering Standard 調(diào)質(zhì)規(guī)范
• non -hardening and tempering oil pipe 非調(diào)制石油管鋼
• hardening and high temperature tempering 調(diào)質(zhì)
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