Pressing Oil from Seeds 【T1】______by using pressure. A machine 【T2】______ is often used. The first step in pressing the oil

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问题     Pressing Oil from Seeds
    【T1】______by using pressure. A machine 【T2】______ is often used. The first step in pressing the oil from seeds is to【T3】______. A【T4】______or bag is filled with the crushed seeds. Then the bag【T5】______. Some of the oil【T6】______the bag and can be collected. But some oil will remain in the crushed seeds【T7】______.【T8】______to get the rest of the oil out is to【T9】______on the crushed material.
    Another method is to place several cloth bags【T10】______. Then【T11】______. on the bags.【T12】______ Much greater pressure can be produced【T13】______.【T14】______, the more【T15】______.
【T11】

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答案a long wooden stick is used to slowly push a heavy cover down

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