From the outside of the seal of the pollutants permanent embedded seal on the blade surface and cause shaft sealing lip premature wear of margin;
污染物从密封的里外面永久性的嵌入密封刃口上造成轴表面和密封唇缘的过早磨损；
The utility model is compact in structure and beautiful in appearance with the dust-proof sealing ring which is capable of effectively preventing outside dust coming into the cylinder.
本实用新型结构紧凑、外形美观，并 带有防尘密封环，可有效防止外界灰尘进入气缸。
According to the factors of operation pressure, medium and temperature, the specification and outside dimension of hollow metal O-ring, the detailed dimension of sealing groove were determined.
设计时应根据操作压力、介质和温度等条件确定金属空心o形圈的外形尺寸和规格，然后进行矩形槽的设计。
Sealing gel is dripped into the metal ring and filled around the silicon piezoresistive pressure sensor, so as to isolate the chip of the sensor from the outside environment.
在金属圈内滴封包封胶，填充在硅压阻式压力传感器的四周，隔 绝传感器芯片与外界环境的接触。
A rectangular sealing ring and a plunger dust cover are provided outside of the plunger.
活塞外设有矩形密封圈和活塞防尘罩。
It is characterized by that it is formed from 5 layers of plastic pipe, adhesive layer, steel pipe, alloy layer and hole-sealing film in turn fron inside to outside.
其特征在于该合金钢塑复合管由5层组成，从里到外依次是塑料管、粘结剂层、钢圆管、合金层、封孔膜。
It is characterized by that it is formed from 5 layers of plastic pipe, adhesive layer, steel pipe, alloy layer and hole-sealing film in turn fron inside to outside.
其特征在于该合金钢塑复合管由5层组成，从里到外依次是塑料管、粘结剂层、钢圆管、合金层、封孔膜。
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