目的：探讨管腔内高压能否引起钛夹或可吸收夹松弛、移位或滑落，单个腹腔镜夹闭合管腔是否安全。
Objective: To determine if clips for laparoscopic surgery become displaced with high intraluminal pressure and if a single laparoscopic clip applied correctly to a vessel is secure.
无桩尖管桩锤打过程易造成管桩移位、内伤、断桩、嵌岩差、持力层锚固长度小。
Shift, internal injury, breaking, bad imbedded in rock, as well as short anchorage distance etc.
无桩尖管桩锤打过程易造成管桩移位、内伤、断桩、嵌岩差、持力层锚固长度小。
Shift, internal injury, breaking, bad imbedded in rock, as well as short anchorage distance etc.
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