| 摘要 |
A periphytic box-like scraper comprises a frame, a cutterbar, made as a knife, a sieve bag, a handle. The frame consists of three sections, the knives of the cutterbar are fixed at an angle of 45°-50° between the plane of the blade and the axle of the handle, the handle with a ruler is made as a dismountable one, on the upper side of each of the sections on a spring mechanism a friction-fitted closure is disposed. A string is fixed to the stopper of the mechanism, the sieve bag is fixed from the lower side of each of the sections. After sampling the material said bag is taken off. |
