Anyone can share the MQ-137 sensor file ,please?
Not enough information to do anything with. You don’'t say if you want the bare sensor, or one of the modules (and if so which exact module.) A google search of the form “fritzing part MQ-137” turns up a variety of hits on MQ type sensors (not the 137 directly though) one of which may do.
Peter
MQ-137 ammonia gas sensor module
You need to provide a web site that describes exactly the module you want as a google search of the form "MQ-137 " indicates there are several of them. There is a template in the parts help category which specifies the information required to request a part. Basically that is a web site with the physical dimensions and connection information for the exact module you want.
Peter