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[单选题]
吊笼底板宜采用厚度不小于()的木板或不小于()的钢板。
A.50mm1.0mm
B.50mm1.5mm
C.80mm1.0mm
D.80mm1.5mm
查看答案
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A.50mm1.0mm
B.50mm1.5mm
C.80mm1.0mm
D.80mm1.5mm
A.底部挡脚板高度不应小于100mm,且宜采用厚度不小于1.5mm的冷轧钢板
B.吊笼内净高度不应小于2m,吊笼门及两侧立面应全高度封闭
C.吊笼底板应有防滑、排水功能;其强度在承受125%额定荷载时,不应产生永久变形
D.吊笼上最高一-对安全钩应处于最低驱动齿轮之下
A.钢板厚度不小于5
B.角钢截面不小于L50
C.角钢截面不小于L45
D.钢板厚度不小于4
A.100,1.5
B.120,1.5
C.150,2.0
D.150,2.1