Carbon fibre is an expensive alternative to making things in steel or aluminium, but besides being extremely strong it is also very light.
碳纤维可以被用于代替钢铁或是铝,但其造价十分昂贵;它不仅有极其强的张力,而且质地非常的轻。
Damask steel originates from India where people can spend years on meditation or making a sword.
大马士革钢由印度传入。在那里,人们花多年时间冥想,也会花多年时间造刀。
A steel roller bearing a raised design, used for making a die or a printing plate by pressure.
轧模机上有隆起的钢制滚筒,用来压制印模或印板锅炉及压力容器安全。
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