petroleum base hydraulic oil

例句：

1. 1. The new pump uses a petroleum base hydraulic oil that is more efficient than traditional ones.
   这款新泵使用了一种比传统油更高效的石油基液压油。
2. 2.In the construction industry, this type of oil is commonly used in hydraulic systems to ensure smooth operation.
   在建筑业中，这种油常用于液压系统以保障顺畅运行。
3. 3. The engineers carefully mixed the petroleum base hydraulic oil to achieve the optimal performance for the machinery.
   工程师们仔细混合了石油基液压油，以确保机器达到最佳性能。