We can machine and slot the commutator.
我们可以把换向器光车并拉槽。
There are sparks at the commutator. Please find out the trouble and put it right.
换向器上有火花，请找出故障并排除它。
But it has commutator, complex, expensive, difficult to maintain, not suitable for harsh environments.
但它有换向器，结构复杂，价格昂贵，维护困难，不适于恶劣环境。
But it has commutator, complex, expensive, difficult to maintain, not suitable for harsh environments.
但它有换向器，结构复杂，价格昂贵，维护困难，不适于恶劣环境。
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