stepladder造句
Getastepladderinsteadofclimbingonamakeshiftscaffoldsuchasachairortable.Oneconclusionoftestsmadewiththismachineisthatatripodstepladderismorestableandsafertousethanonewithfourlegs.Boundingdowntheaircraf...
Getastepladderinsteadofclimbingonamakeshiftscaffoldsuchasachairortable.Oneconclusionoftestsmadewiththismachineisthatatripodstepladderismorestableandsafertousethanonewithfourlegs.Boundingdowntheaircraf...