“switch pretravel”的概念、定义、翻译、参考文献-科学参考

单词	switch pretravel
释义	switch pretravel [`swich `prē´trav·ǝl] ^ELECTRICITY That movement of a switch-operating level that takes place before the switch is actuated either to close or to open its contacts.
随便看	Pisces Volan piscicide Piscis Australis piscivorous pi section filter Pisionidae pisolite pisolith pisolitic pisolitic tuff pisoparite pistachio pistil pistillate pistol pistol lanyard piston piston attenuator piston blower piston corer piston displacement piston drill piston engine piston flow piston gage

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