91精品一区二区三区久久,欧美日韩久久婷婷,亚洲精选91,午夜影院毛片,看全色黄大色大片免费,久久人人插,激情伊人久久

The manufacturing process of the CT system phantom is as followed:materials experience baking to stress relief, CNC machining, polishing,ultrasonic cleaning, adhesive protection, gluing,and glue curing. In order to ensure the transparency of the products, we willcarry out the above procedures again to realize the precision machining of theproducts. Then, go on silk screen and the assembly.