| http://www.w3.org/ns/prov#value | - Preferably the end faces of the first and second connecting pieces are each recessed to receive therein an associated part of the central annular portion of the metallic sealing ring, said end faces each including an annular outer region bounding the associated recess for abutment one with the other to determine the limit of axial movement of the connecting pieces one towards the other and therefo
|
