| 1. | Most of them had hard faces .
他们的脸多半是铁板的。
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| 2. | Hard facing is weld deposited cobalt base alloy
硬面焊接钴基合金沉淀物。
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| 3. | Hardened seating surfaces ? both disc and body seating surfaces are hard faced for maximum service life
硬化的阀座表面?阀瓣和阀体地阀座表面都经过表面硬化，最大限度延长使用寿命。
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| 4. | Non - lubricated , tapered plug assures tight seal with low breakout torque . constructed of hardened materials with optional hard facing
无润滑，锥形阀塞确保紧密密封，并且具有很低的启动扭矩。有硬化材料构造而成，配置备选硬面。
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| 5. | Mechanical equipment of nuclear reactors : design and construction rules . hard facing by cobalt alloys melting for mechanical equipment of nuclear reactors
原子反应堆机械设备.设计与制造规则.原子反应堆机械设备用钴合金固熔法表面硬化
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