Trial balloon meaning in hindi

How to pronounce Trial balloon
As noun : जनमत की परख Ex:  The appointment, removal of that official is only a trial balloon
वायु प्रवाह जाँचने का गुब्बारा Ex:  This news is just a trial balloon
Examples
Usage of Trial balloon in sentences

The word can be used as noun in hindi and have more than one meaning. 
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