摘要英文--
main big sheds material has: The arch pole , pull rod , cement block , column , shed film pressure, film wait gleam. Big sheds are big sheds and big sheds of Shan Dong etc. mainly mark including big sheds of ridgepole , bamboo wood. Benefit big sheds coming an ABC of big sheds of union , our to be explained the
simple experiment having designed one are cultivated. First, we have prepare the experiment implement , the instrument , material have waited.
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