The boom assemblies are disposed between a chassis and {HEAD ~ a platform} for raising and lowering {TAIL ~ the platform} in interlocking relation with an operating mechanism, a guiding mechanism and a synchronizing mechanism 
for raising
The boom assemblies are disposed between a chassis and { HEAD ~ a platform } for raising and lowering { TAIL ~ the platform } in interlocking relation with an operating mechanism , a guiding mechanism and a synchronizing mechanism
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH