simple perforation plate

译网情深 - 打印文章 - ... silver-plated ware 镀银器具 simple perforation plate 单穿孔板 simple sieve plate 单筛板 ...

丝锁气压计_馆档网 ... "单一穿孔"," Simple perforation" "单一穿孔膜"," Simple perforation plate" "单纹孔"," Simple pit" ...