The crystal is shiny glass, but is common to the oil sheen on the surfaceoffracture.
晶面呈玻璃光泽，但常见到的是断口面上的油脂光泽。
2
The chemical composition, metallographic structure, hardness and surfaceoffracture are analyzed herein for the broken blade and lacing wire in order to find the cause of blade fracture.
针对断裂叶片及拉筋进行了化学成分、金相组织、硬度、断口等分析，以便找到叶片断裂的原因。
3
The fault, fracture, unconformable surface and reservoir are the major channels of hydrocarbon migration in gentle slope belt.