three-arm protractor：三臂分度器

賽因福錄條件 Schermpflug condition | 三臂分度器 three-arm protractor | 三邊裁切 tri-cut

three-arm protractor：三桿分 儀

07.124 頻 誤差frequency error | 07.126 三桿分 儀three-arm protractor | 07.127 分儀sextant

protractor scale：分度器, 半圓規(guī), 量角器 分角器標度

cylinder face 汽缸滑閥面 | protractor scale 分度器, 半圓規(guī), 量角器 分角器標度 | reduced width 折合寬度

protractor scale：分度尺

分度,刻盡 graduation devision | 分度尺 protractor scale | 分度尺 scale graduated

protractor scale：分度規(guī)量表

protection 保護,防護 | protractor scale 分度規(guī)量表 | psychiatric rehabilitation 精神科康復

vernier protractor：游標量角器

vernier micrometer 游標千分尺 | vernier protractor 游標量角器 | vernier reading 游標讀數

vernier protractor：游標分度器

"游標顯微鏡","vernier microscope" | "游標分度器","vernier protractor" | "游標尺","vernier scale"

bevel protractor：量角規(guī)

bevel pinion 小傘齒輪 | bevel protractor 量角規(guī) | bevel seated valve 錐形座閥

bevel protractor：斜口分度規(guī),活動量角器

bevel planet gear 行星錐齒輪 | bevel protractor 斜口分度規(guī),活動量角器 | bevel square 斜角規(guī)

bevel protractor：活動量角器

bevel planet gearing 行星傘齒輪裝置 | bevel protractor 活動量角器 | bevel sequare 斜角規(guī)