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5. เครื่องหมายบังคับมีลักษณะเป็นอย่างไร จงอธิบาย
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6. ปัจจัยสิ่งแวดล้อมการทำงานที่ล้อมรอบตัวผู้ปฏิบัติงานมีองค์ประกอบอะไรบ้าง จงอธิบาย
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