扁平钻用于钻削3.5英寸(90毫米)或更大的大孔。
Spade drills. Spade drills are used for drilling large holes of 3.5 in. (90mm) or more.
蜈蚣钻缝能力极强，它往往以灵敏的触角和扁平的头板对缝穴进行试探，岩石和土地的缝隙大多能通过或栖息。
Centipede seam drilling capacity is very strong, it tends to sensitive antennae and flat panels on the first hole to test the joints, rocks and through most of the land or habitat gaps.
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