According to the shape of screening impurities to choose hole-shaped sieve plate(move out long, Diamond impurities) and the slit-shaped sieve plate(move out particles shape impurities and emplastic).
根据筛选杂的
状特点可以选择孔
筛
(
长、菱
杂
)
缝
筛
(
粒
杂
胶物)。