1. Petals 5, sometimes basally slightly connate, convolute. 花瓣5，有时基部稍合生，旋卷。
2. Petals 5, imbricate or convolute, unequal, anterior one usually larger than others, saccate, gibbous or spurred at base. 花瓣5，覆瓦状或，不等长，通常大的下花瓣其它，囊状，囊状或距在基部。
3. This study has found that the inlet flow in the chamber has large influence on the loss of flow of the convolute by-pass flow around the valve body. 在阀体两侧和阀箱之间加装侧止回流挡板可以有效改善阀箱的气动性能，减小阀箱的损失。
英英解释
v.
1. curl, wind, or twist together
2. practice sophistry; change the meaning of or be vague about in order to mislead or deceive adj.
1. rolled longitudinally upon itself
