Page 15 - ใบความรู้หน่วยที่ 2
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                 8.                                        ลักษณะการใช้งาน
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                 9.                                        ลักษณะการใช้งาน

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                 10.                                       ลักษณะการใช้งาน
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                                                           ลักษณะการใช้งาน
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               ตอนที่ 2.  จงตอบคำถามต่อไปนี้
                     2.1 เครื่องกลึงหมายถึงอะไร และมีหน้าที่อย่างไรบ้าง

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                     2.2  เครื่องเจาะหมายถึงอะไร และมีหน้าที่อย่างไรบ้าง

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