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Pencil cannot be used in the pen root. Why should there be pencil lead?

Source: Time:2018-01-04 14:32:28 views:

This is primarily a pencil making process. If not to the end of the core is not in pencil at the end of the hollow, have to control the length of each board slot (at the end of a period of not open), plus one more parts soon groove tools to move up and down to white space.
This is primarily a pencil making process. If not to the end of the core is not in pencil at the end of the hollow, have to control the length of each board slot (at the end of a period of not open), plus one more parts soon groove tools to move up and down to white space. This undoubtedly increases the cost of machine manufacturing, the cost of operations, and the corresponding improvement of the defective rate, which is not cost-effective compared with that point.

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