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从推广木桿卡岩心的經驗后,我們又进一步的針对其缺点进行改良,試用竹桿卡岩心,效果良好,现在开始大力推广。制造方法:用竹筷子簡单的削园一点,下部稍为錐形体(即为尖形),根据鑽头类型与岩心大小所存留的间隙来決定所需的規格大小,长度1.5～2公寸。使用方法:①把鑽具提高至离孔底1～1.5公寸地方;②每次下四根至五根(分大中小三类,中类两根,大小类各一根或两根都可);③下完后先冲孔十分鐘左右,(根据孔的深度)然后可以稍开車旋轉鑽
From the experience of promoting the wood card core, we further improved its shortcomings, the trial of bamboo card core, the effect is good, and now it is vigorously promoted. Manufacturing methods: bamboo chopsticks simple cut a little lower part of the slightly conical body (that is pointed), according to the type of core and core size of the gap to determine the size of the required size, length of 1.5 to 2 inches. Usage: ① to improve the drilling tool to the bottom of the hole from 1 to 1.5 inches; ② each time under the four to five (sub-medium and small three categories, two in the class, the size of a class or two can be ); ③ after punching for about ten minutes after the next, (according to the depth of the hole) and then you can drive a little bit rotary drilling