A reciprocating air compressor is running roughly and vibrating excessively, indicating that the （）.<br>A:compressor is overloaded<br>B:motor is overloaded<br>C:foundation bolts are loose<br>D:belts are too tight

A reciprocating air compressor is running roughly and vibrating excessively, indicating that the （）.
A:compressor is overloaded
B:motor is overloaded
C:foundation bolts are loose
D:belts are too tight

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