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, dates to around . early airbrush prototypes were used to coat photographic plates and retouch photos by hand. the advent of new technology in the early s inspired artists to experiment with new airbrush techniques to produce images of this machinery. the bauhaus group, known for their unification of...
mixer fea... news questions company news industry news contact us tel: email: address: no. nan street,zhutang town,jiangyin city,jiangsu province,china. dry powder mixer features distinctive source: date: . clicks: the dry powder mixer is a machine that uniformly mixes two or more kinds of powder materials...
alloys have made them one the most popular materials for cast metal sculptures throughout history. indeed, bronze sculptures have been found among the ruins of ancient civilizations in china, india, greece, and rome, and bronze casting has remained a preferred practice among sculptors to this day. its...
energy used to gather materials) or a disadvantage (less ability to specialize construction). the available evidence suggests that natural selection more often favors specialization over flexibility in nest construction. [ ] [ why?...
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animal farming update: / / molasses is usedin livestock to improve palatability, some mineral supplements for animal feed. corn stalks after harvest with the highest nutritional value of all kinds of grain by-products, and so it has great potential in improving the nutrition of cattle. according to...
many parts of the world, wood is scarce or becoming scarce. this requires mdf producers in these areas to use alternative raw materials, such as annual plants. the advantages of these fiber sources are a short growth period and a high growth rate in tons per hectare. some agricultural industries, e.g...