BACKGROUND: The filling compactness can not be guaranteed due to apparatusretention in traditional lateral condensation.
背景:传统的侧方加压充填,在充填时因器械滞留易形成死角,充填致密性难以得到保证。
2
The apparatus permits easy and quick attachment (and removal) of the portable device to an object (i. e., the belt) while providing secure retention when not in use.
The sand retentionapparatus is composed of an upper joint (1), a central tube (2), a retention ring (3), a sealing element (4), a spacing ring (5), an adjusting ring (6) and a bell mouth (7).