众所周知，水力压裂和水平钻探技术其实已经诞生几十年。
As we all know, hydraulic fracturing and horizontal drilling technology has already been evened for decades.
为查明洞窟卸荷裂隙的分布位置，最可靠的方法是在现场进行水平钻探。
Onsite horizontal coring is the most reliable method to use when searching for the distribution position of unloading cracks.
商品领域的局部行业，如巴西石油公司的深海钻探，确需高水平的技术专长。
Pockets of the commodity sector, such as Petrobras’s deepwater drilling, do require high levels of technical expertise.
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