求翻译：7、集油装置。开发初期的集油装置均较简单，集油效果不好。目前吸油烟机的导油、集油结构基本均较科学合理，基本上解决了导油、集油效果不良的问题。是什么意思？

7, oil installations. Initial set of developers than a simple oil installations, oil is not effective. Hood of the current lead oil, oil structure than the basic scientific and rational, basically a guide to solve the oil, oil effect problem of the poor.

7, the oil installations. The early stages of development group oil installations are relatively simple, the oil yield good results. The current cooking hoods of oil, the oil is more scientific and rational structure basically basically resolved the oil, the oil ineffective.

7th, gathering of oil installment.The development initial period gathering of oil installment is simple, the gathering of oil effect is not good.At present attracted the lampblack machine to lead the oil, the gathering of oil structure basically is scientific reasonably, basically solves has led the

Oil 7, set installation. Oil collector sump tank in the early development is relatively simple, set oil well. Current range hood leads the oil, oil gathering are more scientific and rational structure, basically solved the problem of oil, oil gathering adverse effects.

7, oil installations. Initial set of developers than a simple oil installations, oil is not effective. Hood of the current lead oil, oil structure than the basic scientific and rational, basically a guide to solve the oil, oil effect problem of the poor.