Relatively few firms today can manufacture actuators at scale with a high level of precision, and these components are still a long way from the incredibly engineered muscles that allow animals to move with such grace and efficiency.
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Cognates - First Pass
Better suited for short copy
（三）在铁路、城市轨道交通线路、桥梁、隧道、涵洞处挖掘坑穴、采石取沙的；