37 Repair services for stair lifts, modular stair lift systems, lifts, escalators, moving staircases, moving walkways, chair hoists, wheelchairs, electric vehicles, apparatus for aiding operation, entry and exit of vehicles, apparatus for aiding mobility and security harnesses for use with vehicle seats; installation services for stair lifts, modular stair lift systems, lifts, escalators, moving staircases, moving walkways, chair hoists, wheelchairs, electric vehicles, apparatus for aiding operation, entry and exit of vehicles, apparatus for aiding mobility and security harnesses for use with vehicle seats; maintenance services for stair lifts, modular stair lift systems, lifts, escalators, moving staircases, moving walkways, chair hoists, wheelchairs, electric vehicles, apparatus for aiding operation, entry and exit of vehicles, apparatus for aiding mobility and security harnesses for use with vehicle seats