1. Aimed at the current status of petroleum slotted sieve tube, a kind of new typed slotted sieve tube with compound slot was developed.

2. The utility model relates to a corundum sieve tube used in the field of oil field and oil well production.

3. The sieve tube elements of the secondary phloem were relatively shorter, with simple sieve plates in the slightly inclined to almost horizontal end walls.

4. The tracheid and sieve tube elements are all differentiated from the procambia in the center of the haustoria, and the former occurs prior to the latter.

5. Line canal is by make shoe, bushing, sieve tube , buckle the composition such as pipe nipple.

6. Cyclosis ( cytoplasmic streaming) The streaming of cytoplasm in a circular motion around the cell observed in some plants, particularly young sieve tube elements.

7. The sieve element of the primary vascular system of the seedling of Nelumbo nucifera was sieve tube element.

8. Companion cells arrange in a row or single cell as long as the sieve tube member.

9. Companion cells arranse in a row or single cell as long as the sieve tube member.

10. The streaming of cytoplasm in a circular motion around the cell observed in some plants,[/sieve tube.html] particularly young sieve tube elements.