37 Installation, servicing and repair services relating to locks and locking mechanisms, mechanical interlocking mechanisms, mechanical safety interlocks, security locks, locks and mechanical interlocking systems for vehicles, trailers and loading bays, key operated locking devices of metal, incorporating multiple padlocks and parts of such devices, keys, door locks, lock cylinders, security lock cylinders, locking pins, mechanical lockable couplings, pipe couplings, all of the aforesaid goods being metal; Installation, servicing and repair services relating to interlocks, mechanical, electro-mechanical, motion sensing, and integrated technology interlocks, circuit breakers, electronic key fobs being remote control apparatus, encoded magnetic cards, radio-frequency identification (RFID) tags, radio-frequency identification (RFID) readers, sensors for the protection and safety of people and objects, electromechanical valve safety equipment, access control apparatus, integrated loading bay safety systems, electric locks, electrical locking systems, key operated locking electrical switches, electrically, electronically and electromechanically operated interlocking mechanisms, electromechanical and electronic safety interlocks, safety interlock switches, safety controllers and modules, emergency stop and stop controls, emergency stop devices, namely push buttons, trip switches, light curtains, touch cable, and interlock switches, sensor switches, electro-mechanical valve safety equipment, electronic door locks, digital door locks, smart door locks, electric couplings, electromechanical couplings, locking coupling safety products, programmable logic controllers, interlocks for use with programmable logic controllers, programmable logic controllers for use with interlocks.