The adjustment may be performed by adjusting the force exerted on {HEAD ~ a membrane}, which has been inserted in {TAIL ~ a wall} of the reference cell 
inserted in
The adjustment may be performed by adjusting the force exerted on { HEAD ~ a membrane } , which has been inserted in { TAIL ~ a wall } of the reference cell
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH