Casting materials and their melting

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What China has been using for many years is based on the carbon content of steel as a grading standard. Table 1 lists the national standards for cast carbon steel. Regarding the grade, chemical composition and mechanical properties of the steel, the “ZG” in t ...

What are the “culprits” that cause discoloration of…

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Equipment aspect (1) The equipment is not clean. Dust or other dust deposits on the hopper to contaminate the material. (2) Temperature control failure due to thermocouple, temperature controller or heating system imbalance. (3) There are obstacles in the barrel, whic ...

What is biodegradable polylactic acid? What role does i…

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1. Polylactic acid Polylactic acid (PLa) is a synthetic polymer material with excellent biocompatibility and biodegradability. PLa, a linear thermoplastic biodegradable aliphatic polyester, is derived from starch extracted from some plants such as corn, wheat, and cassa ...

Ancient City and Ancient Building Fire Safety Measures

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News Related Keywords: No tags. "Heavenly things dry, beware of fire candles," when talking about ancient architecture, Xiao Bian must not think of watching movies in the ancient drama "playing more people" at night to fight even more words. Now, after pondering, I feel that in ...

The influence of Huang Jing weather on film productionâ…

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When the environment clearly shows high temperature and high humidity, the film dry composite processing, a considerable number of composite color printing manufacturers have not paid attention to this potential change, naturally there are many quality problems in the co ...

Closed balcony decoration should pay attention to what …

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Today's housing prices are getting more and more expensive. People can buy smaller and smaller areas. In order to increase the area of ​​use of the home, many people will seal the balcony and transform it, such as a small garden, a small study or a small bedroom. But after all, t ...

Analysis of alternative regeneration methods for plasti…

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Nowadays, plastic recycling and recycling are increasing. For example, orange juice bottles can be recycled to produce shampoo bottles. Milk bottles can be used to regenerate detergent bottles. Sports beverage bottles can be recycled and re-created. The shampoo bottles can be regenerated. Into a sha ...