servomechanism
noun [ C ] engineering specialized uk/ˈsɜː.vəʊˌmek.ə.nɪ.zəm/ us/ˌsɝː.voʊˈmek.ə.nɪ.zəm/ (also servo, uk/ˈsɜː.vəʊ/ us/ˈsɝː.voʊ/)
伺服机构(或系统)
a system that uses a small amount of power to control the power of a larger machine
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