The disadvantage is lower mechanical strength, oil, solvent and acid poor, difficult to cure more expensive.
缺点是机械强度较低，耐油、耐溶剂和耐酸碱性差，较难硫化，价格较贵。
2
The pneumatic throttle interlocking device solvent the problems in the prior art, including inflexible shape, inconvenient installation, high cost and poor sealing property.