spring quality meaning in English

泉质

Standard specification for steel wire , music spring quality
乐器用优质弹簧钢丝标准规范
Oil tempered carbon steel valve , spring quality wire , and springs
油回火碳素钢阀弹簧钢丝和弹簧
Oil tempered chromium - vanadium valve spring quality wire and springs
油回火铬-钒汽门弹簧优质钢丝和弹簧
Standard specification for chromium - vanadium alloy steel valve spring quality wire
阀簧级铬矾合金钢的标准规范
Standard specification for steel wire , oil - tempered carbon valve spring quality
阀簧级油回火碳素钢丝的标准规范

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