websites:https://www.minjiesteel.com/
We are a professional manufacture and exporter for steel prodcuts. The main products are pre galvanized steel pipe, hot dip galvanized pipe,welded steel pipe, square&rectangular tube and scaffolding products. Our manufacturing equipment include 4 pre galvanized product lines, 8 ERW steel pipe product lines, 3 hot-dipped galvanized process lines. According to the standard of GB,ASTM,DIN,JIS. The products are under the ISO9001 quality certification manage mode. Annual output of various pipe is more than 300 thousands tons, covering the range of 21.3-457mm round pipe,15*15-500*500mm square tube,15*20-500*100mm rectangular tube, , with thickness of 0.8-30mm.
Email: info@minjiesteel.com websites:https://www.minjiesteel.com/
We are a professional manufacture and exporter for steel prodcuts. The main products are pre galvanized steel pipe, hot dip galvanized pipe,welded steel pipe, square&rectangular tube and scaffolding products. Our manufacturing equipment include 4 pre galvanized product lines, 8 ERW steel pipe product lines, 3 hot-dipped galvanized process lines. According to the standard of GB,ASTM,DIN,JIS. The products are under the ISO9001 quality certification manage mode. Annual output of various pipe is more than 300 thousands tons, covering the range of 21.3-457mm round pipe,15*15-500*500mm square tube,15*20-500*100mm rectangular tube, , with thickness of 0.8-30mm.
Email: info@minjiesteel.com
How to make a pinhole camera to watch the solar eclipse. This tutorial uses common household items, and is based on recommendations by NASA.
What you need
✔️ A box.
✔️ Two sheets of white paper.
✔️ Aluminum foil.
✔️ Tape.
✔️ A paper clip.
✔️ A knife or scissors.
How to make it
First, cut a small piece of paper and paste it on the inside of the box.
Next, cut out a hole in the box on the opposite side of the box.
Cover the hole up with tin foil and poke a small hole in the centre.
On the same side of the box, cut out another viewing hole.
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