The end walls of sieve-tube elements in the phloem have 4-6 specialized sieve areas which together form compound sieveplates.
韧皮部中筛管分子的端壁是由4—6个梯状排列的筛域组成的复筛板。
2
Centrifugal sieve baskets, tandem and welding sieveplates, gravity bent sieves, and others manufactured by the corporation are noted for reliable quality and stable functions.
公司生产的离心机筛篮、串条式和焊接式条缝筛板，重力曲筛等产品质量可靠，性。
3
Sieve trays are simply metal plates with holes in them.