Can you take a stainless cane with 3 mm in diameter and drill a hole of 2 mm alongside the cane at the depth of 3 cm?
你能否用一根直径为3 mm的不锈钢棒，在旁边钻出一个直径为2 mm、深度为3 cm的孔？
Point sample and solvent evaporating integration, seven channels can be automatically sampling, spot diameter less than 3 mm.
点样和溶剂挥干一体化，七通道可同时自动点样，斑点直径小于3毫米。
Using two 3 mm in diameter, 5 mm high piezoelectric ceramic column replace flint, can be made into a continuous firing tens of thousands of gas electronic lighter.
用两个直径3毫米、高5毫米的压电陶瓷柱取代普通的火石，可以制成一种可连续打火几万次的气体电子打火机。
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