“我有点怕疼，”她告诉牙医说。“您在拔牙之前给我打打麻醉针行吗？”
"I'm a bit of a coward about pain," she told the dentist. "Could I have an injection before you start?"
一种改进是所述麻醉针引导通道(3)是设置于管壁的外壁上的引导槽(4)。
An improvement is that the anesthesia needle guiding passage (3) is arranged in a guiding groove (4) on the outer wall of the tube wall.
一种改进是所述麻醉针引导通道(3)是设置于管壁的外壁上的引导槽(4)。
An improvement is that the anesthesia needle guiding passage (3) is arranged in a guiding groove (4) on the outer wall of the tube wall.
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