單項(xiàng)選擇題木腳手板對(duì)接平鋪時(shí),兩塊腳手板向外伸出橫向水平桿的長(zhǎng)度和不應(yīng)大于();搭接鋪設(shè)時(shí),兩塊腳手板向外伸出橫向水平桿的搭接長(zhǎng)度不應(yīng)小于()

A.400mm,200mm
B.300mm,150mm
C.300mm,200mm
D.400mm,300mm


您可能感興趣的試卷

最新試題