1) darken
[英]['dɑ:kən] [美]['dɑrkən]
黑石
1.
During wax-setting jewelry casting,the gems were prone to crack or darken since they had to withstand the high temperature roasting,the heat impact caused by molten metal during pouring,and the mechanical stress during solidification shrinkage,especially in multi-gems channel setting,which caused great loss to the jewelry company.
蜡镶铸造中,宝石要承受高温焙烧和浇注时高温金属液的热冲击,以及铸造收缩过程中产生的机械应力等影响,特别是在迫镶多粒宝石时,很容易发生烂石黑石问题,给企业造成很大经济损失。
2) pot lead
石黑
3) rendizine
黑色石灰石
4) grey-black limestone powder
黑石灰石粉
5) chert
[英][tʃə:t] [美][tʃɝt]
燧石,黑硅石
6) Schorl
[英][ʃɔ:l] [美][ʃɔrl]
黑电气石
1.
Investigation on Schorl Purification by Wet High-intensity Magnetic Separation;
湿式强磁选提纯黑电气石的试验研究
补充资料：黑石
1.黑色石。 2.石胆的别名。见明李时珍《本草纲目．石四．石胆》。 3.关名。在河南省巩县西南。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条