As an enclosed spring mount, it has the spring between upper and
bottom housings. An anchor hole is on the bottom housing and the tap
is on the top housing, which allows level control of the bolt with a level
bolt and nut to be used. Plus, the spring cap with a bolt guided hole is
at the top of the spring to distribute the load transferred from the level
bolt and the anti-frictioner is attached between upper and bottom
housings, which somewhat reduces attenuation and friction caused by
left-right and top-down relative displacement when the equipment is
running. There is a CR pad attached on the bottom of the bottom
housing to compensate disadvantages of the spring transferring high
frequency due to a kind of surging effect.
Access detailed project specifications and technical data here