The cement remaining in the zone forms an effective hydraulicseal with a high compressive strength.
留在层内的水泥形成了一个具有高抗压强度的有效的液压密封。
2
The commonly used hydraulicseal test and air-tight test for the closed plastic container need to drill a hole on the container body. After test, the container is wasted.
闭口塑料容器一直采用桶身钻孔进行液压和气密试验，浪费较大。
3
Two hydraulic steel gates are raised, so as to seal the gondola off from the water in the canal basin.