Power bucket

1. First of all, your question is not very clear. If you are talking about the Shanzhai national chain before, it can tell you for sure that it is not reliable. In the world of blockchain, except bitcoin and a few mainstream currencies, everything else is rubbish
if you're talking about nationwide computing power in computing power leasing and mining machinery business, it's reliable. At least you're a member of the mining association. The outside world doesn't know much about this group. Our insiders still know this group of people. Although they are all mud legged (compared with bitcontinent), they are all old people in the mining circle. They are also early believers in bitcoin, and they are quite confident.

2. m=pv1t
由v^2=2gh v=8.12m/s
由动量定理得
N-mg=mv/t=pv1*v
N=mg+pv1*v=8.32+17.2=25.4N

3. Hello, the blanking size of the cylinder of pressure vessel, taking the circular cylinder as an example, can be expanded according to the middle diameter, that is, the inner diameter of the cylinder plus the wall thickness of the cylinder, and then the cutting or machining allowance is the blanking size
for example, for a cylinder section with 1m inner diameter, 500mm long and 16mm thick, after blanking, it needs to leave 20mm allowance in the length direction, then the blanking calculation size is: unfold (1000 + 16) * 3.14 = 3190
final blanking size: 3190 * 520

4. When I was a teenager, I could carry more than 200 Jin things

5. Walking on the edge of the law
therefore, the risk of your domestic trading is greater
there is no free market
you can buy it, but it's not easy to sell.