高脚碟状的花冠，圆筒状的筒部，喉缩小，没有鳞片，裂片对正确地重叠。
Corolla salverform, tube cylindric, throat narrowed, without scales, lobes overlapping to right.
由于孔隙衬边型(薄膜型)粘土的产状起了缩小孔喉的作用，所以酸化对此类砂岩油层的作用十分显著。
Because the occurrence of the type of pore-lining clay (film type) reduces size of the pore throat, acidization way show notable effects on this type of sandstone reservoirs.
详细介绍了缩小主料斗喉口改善烧结料层透气度的原因，对ISP工艺烧结生产具有一定的指导意义。
The paper introduces the cause of reducing primary feeding hopper throat inlet to improve the ventilation of sintering mixture, which has certain significance to ISP process sintering production.
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