compendiary

Through to introduce equipments of vertical shaft the cautery ,compendiary introduce insufficiency of electricity-arc spray-paint to prevent cauterization.

通过对竖井井筒装备的腐蚀情况和电弧喷涂长效防腐足的了,建议采用玻钢复合材料井筒装备井筒装备的腐蚀问题。