adding and subtracting machine加: add; plus减: subtract计数: count; tally; counting机: machine; engine加减计数器: add-subtract counter; addsubtract counterr; udc u down counter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:加减计数机，即可在微信中查询翻译
