simple perforation

木材加工行业专业术语之英汉对照 ... 单壁孔(单纹孔) simple pit 单穿孔 simple perforation 档木(集材弯道) sheer log ...

丝锁气压计_馆档网 ... "单测法"," Simple method" "单一穿孔"," Simple perforation" "单一穿孔膜"," Simple perforation plate" ...

复穿孔（simple perforation）：指穿孔板上具有两个以上开口。两个相邻孔口的横隔，称穿孔隔，复穿孔又可细分为以下三种…