three feet tools tool length hardware tape meter measuring workshop centimeters cms inches mms millimeters three-meter Measuring Tape clip art 測量 磁帶 工具 測量磁帶剪貼畫
glass chemical outline chemistry flask lineart laboratory measuring Measuring Glass clip art 測量 玻璃 科學 測量玻璃剪貼畫
from "Wood-working Tools; How To USe Them - A Manual" published by D.C.Heath & Co. Publishers, 1896 no author listed 木材 工作 工具 測量標記
The same as my other blue ruler, however in the first one the numbers are left as fonts, but in this one they are converted to curves. 繪圖 測量 學校 藍色尺規 2