牵引钩
He felt the light delicate pulling and then a harder pull when a sardine's head must have been more difficult to break from the hook.
他感到微弱而轻巧地一拉,跟着较猛烈地一拉,这时准是有条沙丁鱼的头很难从钓钩上扯下来。
He felt a fish pull at his hook.
他感觉到有条鱼在扯钓钩。
The mechanism of reduction is that the LSRF used contacted point of lamina by lamina hook as the fulcrum, through the pedicle screw to pull the spondylolisthetic vertebrae, and reduce the anterior displacement of vertebrae.
MRF的复位机制为以椎板钩与椎板接触点为支点,利用椎弓根螺钉将滑脱椎体向后上提拉,使椎体前移复位。
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