Front or back worn?

 

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The position of the counter lung on the back or on the chest is both found. A chest mounted counter lung offers less resistance with inhalation while a back mounted CL offers the contrary. Same could be said about the exhalation in a reversed way.

 
Chest mounted. Who has info on this rig?
 
Mr. Hans Hass with back mounted counter lung breathing a modified Drger 138.

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