A .0.2
B .0.5
C .1
D .1.5
[单选题]冲击钻机绷绳地锚的埋深应不小于()m。A . 0.5;B . 0.8;C . 1.0;D . 1.2。
[单选题]绷绳地锚应是直径为()的圆木。A .50mmB .100mmC .120mmD . D.150mm
[单选题]绷绳地锚埋深不小于()米,保证坚固牢靠。A .0.2B .0.5C .0.8D . D.1.0
[单选题]井深在3500m以内,18m井架前绷绳地锚中心至井口的距离是()。A.16~20mB.18~20mC.18~22mD.20~22m
[单选题]井深在3500m以内,18m井架前绷绳地锚中心至井口的距离是()。A .16~20mB .18~20mC .18~22mD .20~22m
[单选题]井深在3500m以内,29m井架前二道绷绳地锚中心至井口的距离是()。A.28~30mB.30~32mC.32~34mD.28~32m
[单选题]井深在3500m以内,29m井架前二道绷绳地锚中心至井口的距离是()。A .28~30mB .30~32mC .32~34mD .28~32m
[单选题]井深超过3500m,BJ-18型井架加固的两道前绷绳地锚开挡为()。A.16mB.18mC.20mD.22m
[单选题]井深超过3500m,BJ-18型井架加固的两道前绷绳地锚开挡为()。A .16mB .18mC .20mD .22m
[单选题]井深超过3500m,BJ-29型井架加固的两道后绷绳地锚中心至井口距离为()。A.28~30mB.30~32mC.32~36mD.34~36m