Translation of "combines" into Chinese

This pertains first and foremost to mining and ore-enriching combines

这首先涉及到采矿和黄石浓缩联合企业。

My writing desk, a place of dread: an incredible number of incredibly useful drawers - combined with incredibly little legspace.

我的书桌,一个可怕的地方:难以置信地多的,难以置信地有用的抽屉——合并在难以置信的一点伸腿的地方。