The hydraulic fluid viscosity, the volumetric efficiency and the hydraulic system working efficiency drops, divulging increases, even causes the mechanical device to be unable the normal work.
液压油黏度、容积效率和液压系统工作效率均下降，泄漏增加，甚至使机械设备无法正常工作。
Uh, Normal. Proboscis viscosity.
嗯，鼻部粘度正常。
The problems in the exploitation of such reservoirs are that the high viscosity leads single well to low productivity, and the sand production is also high, affecting the normal production.
此类油藏开采中存在的问题是原油粘度高导致单井产能低，而且极易出砂，影响正常生产。
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