By the action of groundwater erosion and chemolysis, cavities are well developed in limestone area, which causes many problems for pile foundation construction.
由于地下水潜蚀、化学溶蚀等作用，灰岩地区溶洞、土洞较为发育，给桩基施工带来较大困难。
Conclusion:The target-injection of collagenase for intervertebral disk chemolysis may be complementary therapy for recurrent postoperative lumbar disc herniation.
结论：靶位注射胶原酶溶盘术可与手术互补，适用于腰椎间盘突出术后复发的治疗。
Conclusion:The target-injection of collagenase for intervertebral disk chemolysis may be complementary therapy for recurrent postoperative lumbar disc herniation.
结论：靶位注射胶原酶溶盘术可与手术互补，适用于腰椎间盘突出术后复发的治疗。
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