The synthesis methods of magnesia - alumina spinel are electro - fusion and sintering process.镁铝尖晶石的合成方法有电熔法和烧结法.Magnesite deposits account for approximately 80 % of total magnesia production.大约80%的氧化镁产量来自菱镁矿.A substance...
The synthesis methods of magnesia - alumina spinel are electro - fusion and sintering process.镁铝尖晶石的合成方法有电熔法和烧结法.Township enterprises have a paper, agricultural machinery bearings, magnesia and other plants.乡镇企业有造纸 、 农机轴...
The car slowed down and pulled up by the telephone box.车子放慢了速度,在那个电话亭旁边停住了.He was left with no alternative but to hobble to the nearest telephone box.他别无他法,只能一瘸一拐地走到最近的电话亭.I stumbled into the telephone box and dialed 999...