前言： 目的：结合临床对胃癌手术切口防止裂开与感染，采用经壁层腹膜进腹观察术后切口愈合疗效。
Objective: Studying the clinical healing of incision by parietal peritoneum approch on gastric cancer patients in order to prevent the infection and dehiscence of incision.
讨论了破口裂开时间对受力载荷的影响。
对钻井水力压裂开采煤层气时，所形成的裂缝产状和形态进行了理论分析。提出了裂缝倾角、走向和形状的确定依据。
Occurrences and forms of hydraulic fractures in drilling wells are analyzed for extraction of coalbed methane(CBM). The determination basis of dips, strikes and shapes of the fractures are presented.
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