研究再生iir在全钢载重子午线轮胎气密层中的应用效果。
The application of reclaimed IIR in inner liner of BTR tire was investigated.
通过并用NR并加入适量陶土，对全钢载重子午线轮胎气密层胶配方进行改进。
The BIIR-based formula of inner-liner in TBR tire was modified by blending NR and adding proper level of clay.
结果表明，改进后的气密层胶透气系数有所增大，但能够满足有内胎轮胎气密层的要求；
The results showed that the permeability of modified inner-liner to air increased somewhat, but still could meet the requirement of inner-liner in tube-tire;
子午线轮胎气密层对于轮胎保持充气压力，提高轮胎耐久性和行驶安全性具有重要的作用。
The function of inner liner is to maintain proper inflation pressure, thereby enhancing the durability of tires and driving safety.
聚乙烯在内心层形式的封条，使整套液气密性，并提供一个保护性涂层对外部，以保持包装干燥。
Polyethylene in the innermost layer forms the seals that make the package liquid-tight and provides a protective coating on the exterior to keep the package dry.
活塞杆镀铬层的气密性问题，是航空工厂长期存在的一个老大难问题。
The airtight function of chromium plating for piston rod is a knotty technical problem for aircraft factories.
大气层是包围着地球的空气，根据空气密度的不同分为5层，总共有2000- 3000公里厚。
Earth's atmosphere is surrounded by air, the air density, divided into 5 layers, total of 2000-3000 km thick.
大气层是包围着地球的空气，根据空气密度的不同分为5层，总共有2000- 3000公里厚。
Earth's atmosphere is surrounded by air, the air density, divided into 5 layers, total of 2000-3000 km thick.
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