层间裂隙
interlayered crack
interformational fracture structure
孔隙、裂隙结构
constitution pores and crack
裂隙间距
fracture interval
Space between discontinuities
space interval of fracture
fracture spacing
双重孔隙-裂隙介质
dual-porosity fractured medium
dual-porosity medium
活塞环接口间隙
piston ring joint clearance
piston ring gap clearance