How to calculate the rail clamping force

1. It's not worth money. There are few people to play. There is no market. Antique market can often see, one or two thousand.

2. It's priceless in a sense, but it's not valuable in material terms. It will be taken away by the museum and can't be sold

3. valuable

4. Dinosaur fossils are valuable. They must be well preserved.

5. Here are basically layman questions, and then by other layman to answer, how do you know that is the dinosaur fossil? The value of fossils depends on age, species, rarity and completeness. If you want to know the exact answer, take clear pictures of the fossil fragments you found and send them here http://bbs.uua.cn/ Ask.