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单选题
Many sheath-screw davits have markings to indicate the maximum angle to which they should be cranked out. If the angle is exceeded，the davit（）.
A
may jam against the stops
B
will not automatically position the boat at the embarkation station
C
screw may come out of the sheath
D
will chafe against the falls and may cause their failure
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更多 “单选题Many sheath-screw davits have markings to indicate the maximum angle to which they should be cranked out. If the angle is exceeded，the davit（）.A may jam against the stopsB will not automatically position the boat at the embarkation stationC screw may come out of the sheathD will chafe against the falls and may cause their failure” 相关考题
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单选题What is the purpose of the limit switch on gravity davits?（）A
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