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The addition of mechanical metal attachments such as screws and mending plates should be avoided since they can constrict the movement of wood and can lead to cracking . Any manual method or physical or mechanical device , material or equipment attached or adjacent to the resident 's body that the individual cannot remove easily which restricts freedom of movement or normal access to one 's body . Even then it looked more like a mechanical toy than a living creature . Lacking experience in molecular biology , Shapiro realized his first design for a molecular computer as a LEGO-like mechanical device built using 3D stereolithography , which was patented upon his return to Weizmann in 1998 . For Hessen this was part of a life and death political struggle with the Stalinist hacks who were attempting to turn Marxism into a mechanical theory from which dialectics was banished . This spell provides power to an electrical or mechanical device that does not have a power source but is otherwise functional . Inexplicably but intentionally , a mechanical toy monkey on his dresser begins moving manically - it noisily clashes its two cymbals together . This project , in collaboration with researchers mechanical and electrical engineering , is to develop a wireless micro-machined electrical mechanical device for vibration testing and structural health monitoring applications . How do new service products like harvesting of bioenergy , mechanical planting or other silvicultural operations affect on investment needs , on the employment use of the machinery and on the enterprise profitability of the enterprises ? Others are tired of dealing with the mechanical device .