The initial gushing of oil out of a drill pipe is caused by the pressure of the gas trapped and compressed immediately above the oil deposits . 最初石油喷出钻管，是由于受到紧压在石油层上的被密封的气体的压力。
If it is necessary to have the joints under water, they must be bedded into a box or sleeve which absolutely prevents water from penetrating in . 如果有必要在水下接头，就必须把它们安置于绝对不渗水的密封盒子或套管中。
The electric leads to the motor, add in some cases to the pickoffs and torquers, must often be carried through a hermetically sealed gyro case . 通向马达的电源导线，以及在某些情况下通向信号传感器和力矩马达的电源导线，常常必须经过密封的陀螺壳体。
Study on foaming spot - welding sealant for automobile 发泡型汽车点焊密封胶的研制
Don t store water unless keep under tight covers 除非有密封的盖，否则勿储存积水
Process of casing reformation and strengthening seal 套管郑兴与密封加固工艺作法
Using experience of mechinical seal with corrugated pige 波纹管机械密封使用经验
