MZ20-600C2 fully automatic double insurance needle detector (anti-jamming); MZ-99II type smart handheld portable needle detector; MZ-99II type intelligent desk type needle detector; MZ600-AC type full automatic needle detector; MZ610-DII intelligent automatic anti-interference needle detector; MZ-630 intelligent automatic needle detector (anti interference type); MZ-2000C no drive needle detector (line only); MZ-2000 automatic wide type needle detector