stem tube
1.The Characteristics and requitements of the seal of vessel stem tube shaft is introduced and structural form and actual effect of packing seal of vessel stem tube shaft is analyzed, based on comparison, test and screening of seal packing materials, two braiding forms of synthetic fiber compounded packing arc adopted and are tested in real vessels, and good sealing effect is obtained.
5.The corrosion resistant plate penstock is in the frame of obvious-stem, which mainly consists of lifting device, frame, gate plate, seal, wedge block compressing set, rod and rod joint, rod guide tube, install accessory and etc.
8.4.The reaserch was carried on with different growth days simple In Vitro and Bata seedling and the result showed that it had highest surviving rate by tube simple graft only graft material growth period from 30 days to 45 days. 5.Through graft experiment with simple In Vitro ,the result could be hold that grafted plants not only had lower surviving rate , growth also extremely slowed-moving and it expressed the graft stem had obvious pole.
