Before replacing a piston you should check the rings to see that all clearances and gaps are within the permissible （）.<br>A:deflection<br>B:discrepancy<br>C:error<br>D:tolerance

Before replacing a piston you should check the rings to see that all clearances and gaps are within the permissible （）.
A:deflection
B:discrepancy
C:error
D:tolerance

出自：海船船员证

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