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To change the cutter door adopt oil-cylinder plug type.
换刀门采用油缸推拉式。
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Guarantee the engine air cylinder, spark plug and oil passage are cleaned.
保证发动机气缸，火花塞和油路清洁。
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Guarantee the engine air cylinder, spark plug and oil passage are cleaned.
保证发动机气缸，火花塞和油路清洁。
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