单项选择题
A.Bruce anchor B.Dunn anchor C.Hook anchor D.Danforth anchor
An example of a grade C product is（）.A.naphtha，vm and p...
单项选择题An example of a grade C product is（）.
A.naphtha，vm and p B.tridecanol C.cottonseed oil D.camphor oil
An example of a grade B product is（）.A.piperylineB.moto...
单项选择题An example of a grade B product is（）.
A.piperyline B.motor gasoline C.kerosene D.mineral spirits
An entry of water，gas，oil，or other formation fluid into...
单项选择题An entry of water，gas，oil，or other formation fluid into the wellbore is called a（）.
A.blowout B.kick C.gusher D.flow
