() may not justify detention.
A. significant areas of damage or corrosion
B. pitting of plating and associated stiffening in decks
C. pitting of hull affecting seaworthiness or strength to take local loads
D. the condition of such items as ladder ways,guard-rails,pipe covering
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桥梁定期检查的周期最长不得超过()年。
A. 1
B. 2
C. 3
D. 4
20CrMnTi是碳素结构钢。()
A. 正确
B. 错误
功率控制判决是由BSC中的()作出的.
A. SCPR
B. TCU
C. DTC
D. OCPR