Which factor(s) might indicate that a towline should be removed from service? （）<br>A:Visible damage to the towline，including fishhooks<br>B:Measurements showing a decrease in diameter<br>C:A surface condition of corrosion and discoloration<br>D:All of the above

Which factor(s) might indicate that a towline should be removed from service? （）
A:Visible damage to the towline，including fishhooks
B:Measurements showing a decrease in diameter
C:A surface condition of corrosion and discoloration
D:All of the above

出自：海船船员证

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