Weld Plus, supplier of the aerospac e positioner trolley often referred to as a 3 axis positioner, supports the aerospace satellite or spacecraft and dedicated modules of the
http://www.wpi-space-satellite.com/

Modern trolleys often do not use a trolley wheel: either they have a metal shoe with a carbon insert or they dispense with the trolley pole completely and have instead a pantograph.
http://en.wikipedia.org/wiki/Trolleys

Often called San Diego's "moving landmark", the Trolley is also a fun way to get around, whether commuting to work, traveling to the International Border, or heading to Centre City ...
http://www.sdmts.com/Trolley/Trolley.asp

The Domesticated Trolley can often be found in car parks of shopping centers. This environment is known for its hazards, with cars often running into them.
http://uncyclopedia.wikia.com/wiki/Trolley

San Diego Hotels - Discount hotel, hotel circle San Diego, California ... Often called San Diego's "moving landmark", the Trolley is also a fun way to get around.
http://www.pacificinnsd.com/content.cfm?n=sites/trolley.htm