The dart is the only moving plunger part and is capable of withstanding high impacts from high speed wells.
活门是柱塞唯一能移动的部分，能够承受高流量井中高强度的冲击。
If Wells produce at natural productivity, their flow rates decline with the same speed as the mid-and high-permeability reservoirs.
若油井以自然产能生产，油井产量的递减速度并不快，而是与中高渗透储集层基本相同。
To prevent derailments a 2015 study recommended that China ban new water Wells near completed high-speed rail lines.
为防止列车脱轨，2015年的一项研究建议中国禁止在已完工的高铁轨道旁打井。
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