Friday, March 4, 2011
Cordless Drills History let us know more about drills
The use of electric-powered drilling equipment. Is a power tools in the conventional products, but also the greatest demand for products. The annual production and sales accounted for 35% of electric tools in China.Main specifications 4,6,8,10,13,16,19,23,32,38,49 mm drill and so on, refers to a tensile strength of steel on the 390N/mm2 diameter drill holes. Pairs of non-ferrous metals, plastics and other materials than the original diameter of the largest drilling big size of 30 ~
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