split-second operating lever springsplit-secondoperating lever spring双: two; twin; both; dual秒针: second hand活动: move about; exercise杆簧: pole spring; post spring双秒针活动杆: split-second operating lever下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:双秒针活动杆簧，即可在微信中查询翻译
