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- Wellhead hydraulic lifting device is driven by hydraulic power, which is used for well jam release when blowout accident occurrs during workover treatment. It has the following features. 井口液压举升装置是当油田大修作业发生卡钻时，用于解卡的一种专用设备。该设备由液压动力驱动，操作简单，是目前油田大修解卡最理想的装备。具有以下特点：
- soil - well jam 油井堵塞
- This gravelly soil is well drained and good for growing root crops. 这沙土地利於排水，适於种植块根作物。
- Some plants push their roots deep into the soil. 一些植物的根深深长入土中。
- Such crops won't grow in limy soil. 这类作物不能在石灰质的土壤中生长。
- What shall we grow in this alkaline soil? 我们应该在碱性土壤里种什么？
- There are a lot of worms in the soil. 泥土中有许多蠕虫。
- Water has permeated (through) the soil. 水已渗遍那片土壤。
- There are some clods of soil on the mat. 垫子上有些土块。
- The earth in the garden is good, soft soil. 花园里的泥土松软肥沃。
- Water filters through sandy soil and into the well. 水滤过沙土流入井内。
- This kind of soil contains much alkali. 这种土壤含碱丰富。
- She makes her living from the soil. 她以务农为生。
- A plant that does not grow well in lime-rich soil. 嫌钙植物一种富石灰质土壤中长势不好的植物
- The wheat is growing well in the fertile soil. 小麦在沃土中长势很好。
- This kind of jamming not only could avoid the process of coherent radar for blanket jamming to improve the utility of jamming power, but also own better jamming effect than pore deception jamming. 这种干扰不仅消除了相参雷达对压制干扰的处理增益，以提高干扰功率利用率，同时又比纯欺骗干扰具有更好的干扰效果。
- Grass will not succeeded in this dry soil. 在这种干燥土壤中草不会成活。
- This kind of jamming not only could avoid the process of coherent radar for blanket jamming to improve the utility of jamming power,but also own better jamming effect than pure deception jamming. 这种干扰不仅消除了相参雷达对压制干扰的处理增益,以提高干扰功率利用率,同时又比纯欺骗干扰具有更好的干扰效果。
- The soil absorbs only a fraction of the rain that beats down. 土壤只吸收猛打到地面上的雨水的一部分。
- The soil becomes more and more acidic as pollution mounts up. 随着污染的加剧，土壤的酸化越来越严重。
