Less perfect forms , known as " boart " and " carbonado " , are clusters of tiny crystals 稍次些的则由细小的晶体群组成，称为“圆粒钻石”和“黑钻石” 。
3.
July , 2007 ? boart long year drilling service , asia . guizhou jinfeng gold mining industry , sino gold . work as a site interpreter and office administrator 2007年七月至今，中国黄金贵州锦丰金矿宝长年钻探服务（亚洲）公司现场翻译兼办公室行政管理。
4.
Boart longyear drilling products ( wuxi ) co . , ltd , with total investment of 19 . 92 million us dollars , and 200 employees , is located in boustead industrial park of new district , occupying areas of 19 , 090 square meters 公司位于无锡高新技术产业开发区宝德工业园内，占地面积19000多平方米，总投资1992万美元，目前员工总人数约为200人。
5.
Boart longyear drilling products ( wuxi ) co . , ltd , invested and set up by boart longyear group , is a us wholly - owned enterprise specialized in producing and selling bit tools , and develops on the basis of wuxi boart longyear hard metals co . , ltd 宝长年钻探装备（无锡）有限公司，由宝长年集团投资设立，是一家专业生产和销售钎具产品的美国独资企业，是在无锡宝长年硬质合金有限公司的基础上发展而来。
