| http://www.w3.org/ns/prov#value | - The tightening means includes an expandable plug which tightens against the inner surface of the test opening as shown in the embodiments of FIGS. 7, 8, 10 and 11.In the specific embodiments disclosed herein, there is a generally cylindrically shaped section in each of the bulbs 11, 21, 32, 42, 51 and 61.
|
