Is the drawing of the sectional view correct?
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Is the drawing of the sectional view in the attached figure correct? , looking from the left.
The errors are as follows: 1. In the A-A assembly drawing, the orientation of the hatching lines for adjacent metal parts should be opposite to each other, or they should be in the same direction but at unequal intervals. 2. When two circles, one large and one small, intersect, the arc where they meet is not drawn. 3. The method of marking internal threads is also incorrect.