以往的電機測試往往采用普通的指針式儀表由人工讀數、人工記錄，然后由人工整理成數據并描繪曲線或編寫實驗報告。由于某些原因如電源的波動、頻率波動、負載波動等因素會使儀表的指針擺動，為了能比較準確的讀出某一瞬間的各項被測參數，往往需要幾個人同時讀表，工作效率低。不僅如此，由于讀表的不同時性以及讀數、記錄、計算中各種人為誤差還會使實驗數據分散性大，試驗經過的準確度低，重復性差，現在這種測試方法基本被淘汰。
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Riten 3
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Circular Chasers for?Die Head 1C
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3 Lach Diamond carbide tip T-Slot bits U930017/2 slotwall machines CNC routers |
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