{TAIL ~ Method} of saving {HEAD ~ string} of tools installed in an oil well and a corresponding transmission assembly 
{ TAIL ~ Method } of saving { HEAD ~ string } of tools installed in an oil well and a corresponding transmission assembly
TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH