亚洲精品V天堂中文字幕,亚洲性色午夜无码一区二区,亚洲国产一区二区在线观看,日本有码一区中文字幕在线

Glass sand is divided into various types by sieving after ordinary glass is broken

2020-04-20 11:42:38 3063

When we talk about glass beads, we all think of the kind of glass marbles we talked about when we were young. Modern glass beads are really widely used for scratches, such as clothing, evening dresses, shoes, hats, handbags, headdresses, wool textiles, bead embroidery, lighting, handicrafts, etc. Today, let's take a look at the general situation of modern glass beads.


Generally, glass beads are also called glass sand. The glass sand is divided into various types by the sieve after the ordinary glass is broken, which is irregular shape. Glass beads are made by sintering glass sand in an air furnace, most of which are in the shape of a round ball.


亚洲精品V天堂中文字幕,亚洲性色午夜无码一区二区,亚洲国产一区二区在线观看,日本有码一区中文字幕在线