Methods Clinical data of 49 case with free type lumbar disc herniation were analyzed.
方法分析49例游离型腰椎间盘突出症的临床资料。
As a historical category, personality has experienced three stages: dependent type, independent type and free type.
人格是一个历史范畴,它的演变历程可分为依附型、独立性、自由型三个阶段。
Therefore, the self locking type air spring has the function of maintaining the free type gas spring, and can also be locked at any position of the stroke!
所以自锁型气弹簧在保持了自由型气弹簧功能的同时,还可以在行程的任一位置锁定,而且锁定后还可以承载较大的负荷!
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