In the fasteners exported to China by Japan during the first half of 2011, the largest export and export volume were other steel bolts, which were 13.96 billion yen and 23,382 tons, respectively, but fell by 10.95 compared with the same period last year. % and 9.45%. The highest average unit price is other screws, which is 3.35 million yen/ton.
The largest increase in export value was the stainless steel nut, which was a year-on-year increase of 15.85%; the biggest decrease in export value was the self-tapping screw, which was a decrease of 22.19% year-on-year. The largest increase in export volume was for screws, which was a year-on-year increase of 21.40%. The largest decrease was for other screws, which fell 42.09% year-on-year, followed by self-tapping screws, which dropped by 20.77% year-on-year. In addition, the biggest increase in the average unit price for other screws, rose 94.75% year on year, the largest drop in the spring washers, lock washers, a year-on-year decrease of 10.66%.
The advantage of the plastic centrifuge tube is that it is transparent or translucent, its hardness is small, and the gradient can be taken out by the puncture method. The disadvantage is that it is easy to deform, has poor corrosion resistance to organic solvents, and has a short service life.
Plastic Centrifuge Tubes have caps, which are used to prevent sample leakage, especially when used for radioactive or highly corrosive samples. It is very important to prevent sample leakage; the tube cap also has a function to prevent sample volatilization. And support the centrifuge tube to prevent deformation of the centrifuge tube. When choosing this point, you should also pay attention to check whether the tube cover is tight, and whether it can be tightly covered during the test, so as to achieve the inversion without leakage;
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