electric hand saw

基本解释

A curve saw mounted on an electric hand drill is a hardware tool, and is composed of a shell, a handgrip, a transmission system, a saw blade and a base.
手電鑽用曲線鋸頭是一種五金工具，由殼躰、手柄、傳動系統以及鋸條和底座搆成。
ip.com

We saw a number of Electric Imp demos and appliance ideas at the booth including a simple hand-held "detonator" toggle switch with LED, seven-segment counter, water level sensor, servo-controlled gauge, RGB light, power socket, Christmas light, power monitor, toy washing machine, 16x16 LED display and receipt printer (the latter two being combined to show the avatars and tweets of anyone mentioning the Electric Imp) -- all Internet aware.
ENGADGET: Hands-on with the Electric Imp at Maker Faire (video)