在扩眼体设一斜水眼，在导眼体与扩眼体之间连接一缩径增效排屑环，强化了冷却清洗作用，从而保证钻头有较好的使用效果。
Set up a slant water hole at reamer, and connect the reamer and pilot with reducing synergy flute, which strengthen the cooling and washing function and ensure the bit's effects.
当在植物油中抗氧化物的添加量为0 .2 %和0 .6 %时，酒石酸和柠檬酸有较好的增效作用。
Tartaric acid and citric acid have a little synergy action when antioxidation matter concentration in the vegetable oil account for 0.2%and 0.6%.
在相关遗传进度的分析中，干面筋的选择对其他品质性状有较大的增效作用。
In the analysis of correlated genetic gain, the selection for the dry gluten content had increasing effect on other quality characters.
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