单项选择题
What are the two main types of stud link chain?（）
A.Oil Rig chain and Oil Field Stud Link chain B.Flash-butt welded chain and Di-Lok chain C.Flash-butt welded chain and Oil Rig chain D.Oil Field Stud Link chain and Flash-butt welded chain
单项选择题 What action should you take to compensate for the abovecurrent?（）
单项选择题 Under identical load conditions，nylon，when compared with natural fiber line，will stretch（）.
单项选择题 Uncoiling manila line improperly can result in a(n)（）.
