three feet tools tool length hardware tape meter measuring workshop centimeters cms inches mms millimeters three-meter Measuring Tape clip art 测量 磁带 工具 测量磁带剪贴画
glass chemical outline chemistry flask lineart laboratory measuring Measuring Glass clip art 测量 玻璃 科学 测量玻璃剪贴画
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 测量标记
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. 绘图 测量 学校 蓝色标尺 2