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- 1
The main reservoir space style are macroscopic cracking, solution cavity, corroded hollow and inter-crystalline suture. The macroscopic suture is the passage of reservoir space. 主要储集空间类型为宏观裂缝、溶洞、溶孔及晶间孔缝，宏观孔缝是连接储集空间的通道； - 2
The reason of the Weld Joint Cracking on high frequency welding pipe was investigated by using macroscopic observation, metallographic technology, fracture analysis and EBSD technology. 本文通过使用宏观观察、金相分析、断口分析和电子背散射衍射（EBSD）等分析手段对高频焊管焊后弯管开裂的原因进行了分析。 - 3
By means of macroscopic analysis, chemical composition analysis and microstructure examination, the cracking reason of engine exhaust valve stem has been studied. 采用宏观断口分析、化学成分分析及金相检验等方法，对发动机排气门杆断裂原因进行了分析。
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