【电】 needle gap arrester
acupuncture; injection; needle; pin; pricker; stitch
【医】 acu-; needle; Pin; spicula; spicule; spiculum
crack; crevice; gap; interval; opportunity; rift
【化】 opening
【医】 gap; space; spatia; spatium; split
arrester; lightning arrester
【化】 lightning arrester