An apparatus 1, wherein the base has an internal chamber and {HEAD ~ an inlet port} for receiving pressurized gas or fluid into the internal chamber such that the stems are biased toward their extended positions by the pressurized gas or {TAIL ~ fluid} 
An apparatus 1 , wherein the base has an internal chamber and { HEAD ~ an inlet port } for receiving pressurized gas or fluid into the internal chamber such that the stems are biased toward their extended positions by the pressurized gas or { TAIL ~ fluid }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL