PT18 〜に乏しい

PT

加工耐性の点から精度や信頼性に乏しく好ましくない。

(NG) It is not preferable because accuracy and reliability lacks from the stand point of process resistance.

(OK) It is not preferable because accuracy and reliability is lacking from the stand point of process resistance. or,
It is not preferable because accuracy and reliability is deficient from the stand point of process resistance.