21 gauge needle

21 gauge needle 提mRNA时这句话是什么意思：Shear DNA 3 to 4 times using a 21 gauge needle. gauge gauge needle needle 英语翻译Any 23- through 30-gauge needle may be used ,since blood can be aspirated through all of them. 请问以下设备的中文名是什么?1.Lockstitch Button Attachment Machine2.Saf-Q equipmen3.Tunnel-type needle detector4.Neck Stretch Gauge 纺织机器的单位suggested gauge 21ggffsuggested gauge：21ggff 汉语是规格：21?ggff GAUGE-PINS gauge为什么? Gauge-gravity 10-gauge 英语翻译1.Please find report below.These gauges are CONDITIONALLY Approved.Please make the corrections noted before shipment.2.Conditional approval with the spacing between the needle and face of the gauge.The needles were pressed against the fac needle 是什么意思? 16-gauge steel frame 24 Gauge是什么材料 THIKNESS GAUGE 是什么意思?