We found when roller liner of hoist machine used the material of polycreosotester(intensify), that the stress of roller wall was less than that of the wood liner, so we advised to use polycreosotester(intensify) to roller liner.

• 发现提升机卷筒衬板采用聚碳酸脂(增强)材料时，筒壁应力与木衬相比更小，因此建议卷筒衬板采用聚碳酸脂(增强)材料；