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My Items Can Upgrade - Chapter 71: 3D Printer
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Chapter 70: Mysterious Number
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... > Yang Yuan had previously looked at a hardness chart representing materials.
That is:
If talc’s hardness is one, then gypsum’s hardness is two, calcite is three, fluorite is four, apatite is five, feldspar is six, quartz is seven, topaz is eight, corundum is nine, and diamond is ten.
So, in this sense, the hardness of these three points is quite basic, probably even ordinary metals can’t be printed. 𝗳𝚛𝗲𝕖𝚠𝚎𝚋𝗻𝗼𝕧𝗲𝐥.𝚌𝚘𝐦
Yang Yuan had anticipated this, a ...
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