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正断层 zhèngduàncéng
gen.	rift
dril.	ordinary fault
eng.geol.	centripetal fault; down fault; downslip fault; drop fault; normal gravity fault
geol.	true fault
hydroel.st.	normal fault; downthrown fault; downthrow
tech.	downthrow fault; tension fault
正滑断层
tech.	normal-slip fault
正断层相对于下盘而言，上盘沿断层面向下方运动的断层。一般认为多数正断层是在重力作用和水平张力作用下形成的,故又称为重力断层。正断层断层面的倾角一般为45°normal90° zhèngduàncéng
expl.	normal fault
正常断层
tech.	gravity fault

正断层: 49 phrases in 14 subjects

Architecture	1
Artificial intelligence	1
Cartography	3
Chemistry	1
Earth sciences	1
Electronics	1
Engineering geology	2
Hydroelectric power stations	3
Life sciences	1
Oil / petroleum	16
Plastic surgery	1
Space	1
Sports	1
Technology	16