The interacting surfaces were lubricated with a mineral oil.是什么意思？

The interacting surfaces were lubricated with a mineral oil.

相互作用表面是用矿物油润滑的.

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

interacting

v. 相互作用[影响]，互相配合( interact的现在分词 )，交流，沟通，合作；

例句
Millions of people want new, simplified ways of interacting with a computer...
数以百万计的人们想要新的简化方式实现人机交互。

surfaces

n. 面( surface的名词复数 )，水面，外表，（家具的）顶面；

例句
This machine is designed to save you effort, and keep your work surfaces tidy into the bargain...
这种机器既省力，又能保持工作台面的整洁。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

lubricated

v. 加油润滑( lubricate的过去式和过去分词 )；

例句
The interacting surfaces were lubricated with a mineral oil.
相互作用表面是用矿物油润滑的.

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

mineral

n. 矿物，矿石，矿物质，汽水；adj. 矿物的，似矿物的；

例句
...an effervescent mineral water.
含汽矿泉水

oil

n. 油，石油，油画，燃油；vt. 给…加油；vi. 化成油；

例句
Several magnificent oil paintings adorn the walls.
几幅恢宏的油画装点着墙面。