2 aa + perfect round ; excellent luster ; thick nacre ( . 5 of total nacre or better ) ; 90 - 95 % inclusion free surface ; excellent matching ; top 5 % of a pearl farm ' s harvest 圆度极高，极好的光泽，厚的珠层（ 0 . 5或以上的珠层含量） ， 90 - 95 %的表皮光洁度，极好的匹配，珠农收成中最好的5 %部份。
With advanced production equipment , powerful technology force and strong development ability of the products , our factory produces the series products with handsome appearance , durable in use and high polished 本厂生产设备先进，技术力量雄厚，产品开发能力强，造型美观、经久耐用，光洁度高。
Recently , cement - based material has been used not only as staple building material , but also in high - tech fields such as machine manufacture , electronic industry , aviation and aerospace 在原材料中添加适量的纳米sio _ 2 ，陶瓷制品脆性可大大降低，而韧性可提高几倍至几十倍，光洁度也明显提高。
1 aaa perfect round ; excellent luster ; thick nacre ( . 7 of total nacre or better ) ; 95 % inclusion free surface or better ; excellent matching ; top 1 % of a pearl farm ' s harvest 1 aaa圆度极高，极好的光泽，厚的珠层（ 0 . 7或以上的珠层含量） ， 95 %的表皮光洁度或更高，极好的匹配，珠农收成中最好的1 %部份。
According to high tech mirror surface technology principle , floorsurface layer pellet thin , causes its varnish like mirror , the smoothfinish to be extremely high , achieves the regular reflection theeffect 根据高科技镜面技术原理，将地板表层颗粒细化，使其表面光泽如镜，光洁度非常高，达到镜面反射的效果。
Good toughness and wear resistance , suitable for low speed cutting allowing a big rake angle , ensuring the sharpness of the edges , bearing a heavy cutting force and achieving good surface finish 具有优良的韧性和耐磨性，适用于低速切削，允许采用大前角，保证刀刃的锋利性，从而可随大的切削力，并获得光洁度高的表面。
Robust body with raised seating surfaces ground to mirror - like finish . hard plug and body seat facings available . body and plug seats protected from line media in open - close positions 坚固耐用的阀体，配置具有研磨镜面光洁度的凸面阀座表面。可提供坚硬的阀塞和阀体阀座面。在开启-关闭位置，可防止管路流体介质进入阀体和阀塞阀座内。
3 aa very round ( less than 5 % gradation ) ; good luster , good nacre ( . 35 of total nacre or better ) ; 80 - 90 % inclusion free surface ; good / excellent matching ; top 20 % of a pearl farm ' s harvest 3 aa非常圆（少于5 %的那部份的等级） ，良好的光泽，良好的珠层（ 0 . 35或以上的珠层含量） ， 80 % - 90 %的表皮光洁度，好/极好的匹配，珠农收成中最好的20 %部份。
The tianshan series stone has the characteristics such as bright color and lustre , high degree of finish , compression and wear resistant , good ventilation property , even color , low radioactivity etc . , which belongs to high grade decoration products 天山系列石材具有色泽艳丽、光洁度高、抗压耐磨、透气性好、色泽均匀放射性低等特点，属高档装饰品种。
And machine adopt imported microcomputer control system , combining precise electric and air pressure operate system . it s easy to use , steady to run with low fault rate that make the rhinestones good smooth finish and high rate of finished products 本机采用日本进口微电脑控制，结构精密的电气动组合操控，使用方便，运行稳定，故障率低，产品光洁度好，成品率高。
