Cast iron manhole cover anti impact resistance, easy rupture.
铸铁检查井盖不耐冲击，易破裂。
2
It has a rolled, rigidized surface which gives it a high modulus of rupture and compressive strength as well as high abrasion and hot gas erosion resistance.
它具有滚压刚化表面，不仅断裂模数大、耐压强度高，而且具备良好的抗磨损和抗热气腐蚀能力。
3
The use of fibers as reinforcements increases the resistance of the plastic or metal to rupture stress and increases strength while providing a product light in weight.