The first lasers to earn a wage did so by machining very hard materials, such as diamonds, or very soft ones, for example baby-bottle teats.
激光第一次作此用途是加工硬度很高的材料，如钻石，或非常柔软的材料，例如婴儿奶瓶的奶嘴。
The first lasers to earn a wage did so by machining very hard materials, such as diamonds, or very soft ones, for example baby-bottle teats.
激光第一次作此用途是加工硬度很高的材料，如钻石，或非常柔软的材料，例如婴儿奶瓶的奶嘴。
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