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| knife blade (The axial looseness of laminations in the transformer core can be checked by inserting a calibrated knife blade between laminations, so-called "knife test". Nik-On/Off) | |||
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| knife blade (The axial looseness of laminations in the transformer core can be checked by inserting a calibrated knife blade between laminations, so-called "knife test". Nik-On/Off) | |||