How many units of the previous model have failed in the past two years?
在过去的两年里，以前的模式有多少单位未能成功？
In March alone, 20, 000 units of the most popular model, the F5, were sold.
今年3月，就售出共20000辆最流行的F5。
For the construction units to provide reference and the model.
为施工单位提供参考与借鉴。
These units fit with other inputs in a business model and a production process.
这些因素能够与商业模式和生产流程中的其它投入契合到一起。
These units fit with other inputs in a business model and a production process.
这些因素能够与商业模式和生产流程中的其它投入契合到一起。
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