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- safe logic device of parallel action 1
- safe-keeping 1
- safety 39
- safety and health of workers 1
- safety and reliability 1
- safety functioning 1
- safety management system 1
- safety movement 1
- safety of cargo 2
- safety of control systems 1
- safety of functioning 1
- safety of goods 1
- safety of LED matrix circuit 1
- safety of motion 1
- safety of running 1
- safety of the state of immobile objects 1
- safety of the transport process 1
- safety of train movement 2
- safety of transportation service 1
- safety of use 2