Those who have drawn diagrams, take a look and see which one is the authentic one
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The essential tool for engineering drawing in the past
When I was in school, I carried a drawing board around and ran back and forth between the various teaching buildings. Occasionally help a female classmate carry things, climb to the 7th floor, and get some ice cream. So many memories. Judging from the intensity of the ink marks, the one on top should be 2H. The darkness level of 2H is relatively low, resulting in lighter colors; it’s based on a 2H draft, marked as HB, with 2B outlines.
The one above is the genuine product; the one below is too soft
The drawing classroom is on the seventh floor; the teacher still needs to give more consideration
Do we still need to learn manual drawing for mechanical drafting?
The person on the 2nd floor is an expert; it seems they’ve spent a lot of time working on drawing boards
Drawing is the foundation; although CAD is also learned at the same time, manual drawing remains a basic skill that one must master. The handwriting might not be perfect, but there was a classmate whose handwriting in Song typeface was almost identical to printed text, and his drawings were very neat.
For someone like me who has actually climbed climbing walls, the first time I definitely use a softer grade, so it’s easier to make adjustments. Once it’s finalized, of course the darker the better; otherwise I’ll scold you to death for not drawing it properly
Song typeface was used for exam assignments in the past