想翻译某某电梯品牌，（市场保有量已超过五万台，维保数量超过两万台。）

有么有高手帮我英语翻译一下括号里的内容，（市场保有量已超过五万台，维保数量超过两万台。）

先多谢了！！！

OUR ELEVATOR MARKETS HAVE BEEN MORE THAN FIFTY THOUSANDS. AND WE PROVIDE MAINTAINENCE GARENTEE SERVICE TO MORE THAN TWENTY THOUSAND ELEVATORS

The retain quantity have existed beyond(超过) 50 thousand ,while the protected amount has runover(超过) 20 thousand.