43.下列三種牙釘:①自旋式螺釘(self-threading pin) ②磨擦式閉鎖牙釘(friction-locked pin) ③黏合式牙釘(cemented pin),其固持力(retentive force)由大至小的次序為:
(A)②>①>③
(B)③>①>②
(C)①>②>③
(D)②>③>①

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統計: A(78), B(62), C(483), D(16), E(0) #1379501

詳解 (共 1 筆)

#4494379
With regard to the r...

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