变压器不能被称为机器，因为它么有运动的部件。
A transformer cannot be called a machine for it has no moving parts.
套管是变压器中一种重要的部件。
Bushing is one of the most important insulation parts in transformer.
变压器加整流器习惯被称为一体式变压器，是逆变点焊机的核心部件。
The core part of the inverter spot welding machine is the integrated transformer, which is consisted of transformer and rectifier.
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