What a pebble bed reactor is, is in fact the same coatedparticle with the uranium kernel and there are about ten thousand of these particles that are put into a graphite pebble.
什么是卵石层反应堆，事实上就是同样的,铀核包装的微粒,有大约1万的微粒,被放入了一个石墨卵石里。
2
Blade scratch Paper defect where there is a hair-like indentation in a coated surface running in grain direction. Caused by a particle lodged behind the blade during coating.
顺着纸纹方向，纸面的涂层有着像头发丝的凹痕故障。起因是在涂布时有一颗料积聚在刮刀后面所致。
3
The surface of aluminum flakes were coated by the reactant, each single aluminum particle was completely sealed for stabilization of aluminum flakes.