a soft white compact talc used to mark cloth or to remove grease stains
french chalk 例句
英汉例句
using french chalk which was dried by the 120℃ air as the normal air model, the quality which the fabric contains particle can be test.
利用120℃的高温烘干过的滑石粉作为尘源,试验得到该滤料的容尘量;
when used for a time, the lock may not be opened smoothly. do not dip mechanical oil into the lock. instead, slip some french chalk or pencil fines into it.