Assertion: valve's stem | /r/HasProperty | tubular journaled sleeve
Facets:
Source sentences:
text: 15 is a key-piece, preferably of aluminum, provided for each valve piston 12 which is provided with a central screw threaded cap 151 which is threaded onto a key stem 152 which is a tubular journaled sleeve provided with a projecting flange 153 at the bottom.