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19.Whatdoestheoldsayingtellus? A.Theappleisthebestamongallkindsoffruits. B.Applescantaketheplaceofdoctors. C.Eatingapplesregularlydoalotofgoodtoourbody. 20.Whatshouldwedoifwewanttokeephealthy? A.Eatanappleaday. B.Eatproperly. C.Takeasmanyvitaminpillsaspossible. 其次部分阅读(共两节,满分50分) 第...
The sintering process in powder metallurgy (PM) involves heating a compacted powder to fuse the particles, which leads to a harder, stronger part. While the compaction process does a lot of the work, the physical pressure produced in the press isn't enough to create a final, work-ready com...
The Metal Powder Industries Federation (MPIF) launched a new website design, with a cleaner design, expanded content, a new directory of powder metallurgy (PM) fabricators and suppliers, educational video content, and more. 'The previous MPIF website held up well for nearly 20 years, but we...
When the device’s multipurpose jack is damaged or exposed to foreign materials, such as liquid, dust, metal powder, or pencil lead. When you are roaming. Note:Results and symptoms may vary depending on the device and model being used. Some solutions will not apply to certain devices. ...
What material does a 3D printer use? Beyond plastic, 3D printing is expanding to include materials like metal, wood, and even concrete, paving the way for faster, more sustainable, and cost-effective manufacturing in industries from automotive to construction. ...
What is metal 3D printing? How does this additive technology work? This article covers the basic principles of SLM (selective laser melting) and DMLS (direct metal laser sintering) and how these relate to the key benefits and limitations of 3D printing.
If phrases like "platinum status" and "going platinum" are to be believed, the precious metal is the best and baddest in all the land. But how elite is it actually, particularly when compared with its best frenemy, gold? Platinum Vs. Gold Platinum is a naturally occurring chemical element...
The only other metal challenging its weight is osmium, but as it’s similarly rare nothing would be gained. Moreover osmium presents a hazard in the machine shop iridium doesn't: Its powder ignites spontaneously and readily forms a liquid tetroxide that can be gravely toxic. Jewelry makers ...