NFPA 1931 消防梯设计和设计验证试验标准
日期:2012-02-10 11:36
s for multi-purpose ladders and recognizes the installation of multi-purpose ladders in lieu of folding ladders on apparatus. To ensure a minimum duty-rating ladder is employed, this edition also adds a statement of construction specification. (Softbound, 22 pp., 2010)
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