By reinforcing the back of the rubber cup with cord fabric and increasing the diameter of the thrust plate, the service life of drill pump pistons Can be increased greatly, Field tests show that the piston life has reached 118 hours at 30 MPa pump pressure, and 450 hours at 20 MPa.
The properties of oil extended, styrene butadiene rubber (SBR 1706) filled with 19 phr of aromatic oil was studied. The results showed that SBR 1706 had the properties between SBR 1500 and SBR 1712、It was suitable for the application of tire cord fabric rubber and tread rubber in mini medium tires.
The application of the domestic MY-1~# aromati c oil replacing the imported Nftolen ZD aromatic oil in the polyester cord ply c ompound of passenger car tire was described.
It was found through the test of FHD-60 replacing antidegradant A by s ame weight in the inner tube compound of cart tire and the cord ply compounds of light truck tire and tractor tire,and replacing antidegradant RD by same weight in the tread compound of light truck tire that the properties of the test compo unds and finished products were comparable to or better than those of the origin al ones.
The overall performance of 9 00-20 14PR tire reached or was closed to that of 9.00-20 16PR tire by modifying outer profile,replacing 2100dtex/2 nylon 6 carcass plies for 1870dtex/2 nylon 6 carcass plies,using breaker made of one wide ply and one narrow ply instead of that made of two narrow plies.
Mononuclear cells (MNCs) were isolated from human umbilical cord blood (UCB) and cultured in the non-coculture scheme of rhSCF + rhG-CSF + rhMDGF combination and the coculture scheme of rhSCF + rhG-CSF + rhMDGF + hMSCs.
At 16 weeks' gestation, most hepatic cord cells begin to differentiate into hepatocytes and abundant HSCs remain in ductal plate (the origin site of Hering canals).