41. But now they use a special circular saw that allows some parts to be salvaged. 42. 5 . circular saws , band saws and guillotine shears 43. Two stolen circular saws and iron tacks were tried and found not to be bulletproof. 44. The circular saw is persistently listed on timeline of inventions as being invented by Samuel Miller. 45. Most portable circular saws have similar design features. 46. In most cases any saw marks will be the curved, arclike tracks of a circular saw . 47. If you don't have help, and you have a good portable circular saw , consider that instead. 48. Use a circular saw to remove wide sections. 49. Use a circular saw with the blade depth set to match the thickness of the wallboard. 50. Circular saw blades were extremely expensive and highly subject to damage by overheating or dirty logs.
