protractors

Method 50 dry samples of atlas and the projection and direction of screws were measured with vernier calipers and protractors.

方用游标卡尺和量角器对50例干燥寰椎标本的后弓进钉点及进钉方向等相关参数进行测量。

specification for protractors for drawing office use

制图室用分度规规范

specification for bevel protractors (mechanical and optical)

斜量角规（机械与光学式）规范

draughting instruments with or without graduation. part 2 : protractors.

带刻度或不带刻度的绘图仪器.第2部分：量角器

i took a clear plastic tube and attached two circle protractors that could be rotated up and down the tube.

我找来一只透明的塑料试管，然后将两支可以旋转并上下移动的量角器接到试管上。

mr willis has sold out of protractors. i expect everyone wants 60 degrees. willis

先生的量角器都卖完了。我想每个人都在量60度角呢。

After installing the protractors , check the assembly for squareness prior to using the machine.

按完量脚器后, 请在使用前仔细检查各个部件的按装.