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Leads tractability tests and mock recalls .

领导追溯性测试和模拟回收.

Approaching it , you will find its tractability and friendliness .

但当你接近它时，它却是意外地温驯和友善。

Mrs. durbeyfield was only too delighted at this tractability .

德北太太见她这么听话，只有大喜。

Ensures proper product identification and tractability .

确保产品易于区分识别。

Productivity , safety , flexibility and tractability .

产量、安全性、灵活及跟踪能力。