单项选择题
A.three times the circumference of a manila line B.five times the diameter of a manila line C.twice the diameter of its sheaves for manila line D.twenty times the diameter of a manila line
The 12-foot low-velocity fog applicator（）.A.has a spray...
单项选择题The 12-foot low-velocity fog applicator（）.
A.has a spray pattern 12 feet in diameter B.can be used in conjunction with both 1-1/2 inch and 2-1/2 inch all-purpose nozzles C.has a 90°bend at its discharge end D.has a screw thread end which connects to the all-purpose nozzle
Splices made in nylon should（）.A.be long splices onlyB....
单项选择题Splices made in nylon should（）.
A.be long splices only B.have extra tucks taken C.be short splices only D.be around a thimble
Right-laid line should be coiled（）.A.clockwiseB.counter...
单项选择题Right-laid line should be coiled（）.
A.clockwise B.counterclockwise C.either clockwise or counterclockwise D.on a reel
