单项选择题
A.Bale B.Spanner wire C.Bull line D.Working guy
A device used to enlarge the size of an existing bore h...
单项选择题A device used to enlarge the size of an existing bore hole，having teeth arranged on its outside circumference to cut the formation as it rotates is a（n）（）.
A.Enlarger bit B.Casing bit C.Hole opener D.Casing opener
A “figure eight” knot is used to（）.A.be a stopperB.shor...
单项选择题A “figure eight” knot is used to（）.
A.be a stopper B.shorten a line C.join lines of equal size D.keep a line from passing through a sheave
“15 02 41 Semi Double Queen 195 332mm”is a description ...
单项选择题“15 02 41 Semi Double Queen 195 332mm”is a description of（）.
A.ISSA stores B.IMPA stores C.common marine stores D.a reference to be studied
