double-acting door

Improvement of the Seal Structure of the Double-Leaf Swing Door at the Outside End of the Railway Passenger Car

铁路客车外端双扇摆门密封结构的改进

The original seal structure and the improved seal structure of the double-leaf swing door at the outside end are described. The seal performances of the silicon rubber bar, nylon brush and wool brush are compared and analyzed.

介绍了外端双扇摆门的原密封结构和改进后的密封结构，对比分析了硅橡胶条、尼龙毛刷和羊毛毛刷的密封性能。

The DB-PB AIR SHOWER PASS BOX characterizes as double lock between the air brake and door, which enable the box has a better airflow prevention ability than trsditional pass box.

PB型风淋室传递箱具有气闸及门互锁的双重作用，因此较普通传递箱，防止内外气流贯穿的性能更好。

Toughened bulletproof double door, to observe clearly the object in the working chamber.

钢化、防弹双层玻璃门观察工作室内物体一目了然.

Adopt silicon rubber sealing and toughened glass double-layer door with leakage proof device.

采用硅橡胶密封及钢化玻璃 双层 门防泄露装置.