The Netherlands boasts some fine jewellery schools, but, other than diamond-cutting, there is little historical tradition in jewellery making.
虽然荷兰拥有一批引以自豪的高级首饰学校，但是在首饰制作(不包括钻石切割)上几乎没有历史传统。
The processing technique for CVD diamond film mainly includes cutting, molding, grinding, polishing and brazing.
金刚石膜加工技术主要包括切割、成型，研磨抛光和钎焊技术。
The bit is usually a drag bit fitted with either PDC or natural diamond cutting structures, but the core bit is unusual in that it has a hole in its center.
钻头通常属于刮刀型，装备有PDC或者天然金刚石切削齿，但取芯钻头的特别之处在于钻头中心有一孔。
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