The object now is subjected to the blast, and as the sand will not penetrate a softened material sufficient to abrade a surface beneath, the exposed portions alone will be cut away. 威廉·亨利·杜利特.世纪发明.
It is as well, however, not to apply it to any abraded surfaces. 威廉K.戴维.智者、化学家和伟大医生的秘密.
The lower eye would, also, have been liable to be abraded by the sandy bottom. 查尔斯·达尔文.物种起源.