Retentive force and performance of magnetic attachment .
磁性附着体的固位力及其性能研究。
Article 28 an trustee has the right to set the retentive price of an auction target to the auctioneer .
第二十八条委托人有权确定拍卖标的的保留价并要求拍卖人保密。
Article 50 should an auction target have no retentive price , an auctioneer shall make this clear before an auction .
第五十条拍卖标的无保留价的，拍卖师应当在拍卖前予以说明。
The memory is sometimes so retentive , so serviceable , so obedient ; at others , so bewildered and so weak ; and at others again , so tyrannic , so beyond control !
