back beltsの例文

例文

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1. Research has yet to demonstrate the efficacy of back belts in preventing ergonomic injuries.
2. The study included 89 stores that required back belts.
3. "I don't believe this establishes conclusively one way or the other whether back belts work,"
4. Vent buttons and back belts provided the military details.
5. SAFETY : Doubts Cast on Merits of Back Belts