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이동식 사다리 재해 원인을 살펴보면 사다리 자체의 구조적 불안전성에 기인하는 경우도 있으나 대부분 잘못된 설치, ...www.viva100.com 2023-11-05
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A형 사다리와 동일한 기본 구조를 유지해 휴대성과 현장 적용성 등 A형 사다리의 장점은 유지했다. 여기에 작업자의...www.viva100.com 2023-10-22
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