专业的设计成分保护拉钩。

Specific design elements prevent hook failure.

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目的：自制拉钩在矫治后牙扭转中的应用。

Objective: To apply the self - made hook in correcting posterior rotation.

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咱们拉钩发誓，”凯西一边这样说着逗他，一边用她的小拇指去勾迈克尔的。

Pinkie swear, " Kathy said to humor him, entwining her little finger with Michael's.

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咱们拉钩发誓，”凯西一边这样说着逗他，一边用她的小拇指去勾迈克尔的。

Pinkie swear, " Kathy said to humor him, entwining her little finger with Michael's.

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