问题
单项选择题
What does the abbreviation SWL stand for?().
A.Signal wave letters
B.Ship without light
C.Safe water line
D.Safe working load
答案
参考答案:D
What does the abbreviation SWL stand for?().
A.Signal wave letters
B.Ship without light
C.Safe water line
D.Safe working load
参考答案:D