丢不了 meaning in Chinese

no.fast bind fast find

A stone in the well is not lost
井里的石头丢不了。
The seventh generation guarded against losing - " not to be able to lose " guards against the losing - in advance technology , the home newest breakthrough , let your surefire belt child window - shop , how walks loses has managed
第七代防丢器- “丢不了”防丢器-超前的技术，国内最新突破，让你万无一失带小孩逛街，走丢了怎么办？