Assures perfect alignment of disc and seat even at large flow velocities.即使在大流速下,也能够确保阀瓣和阀座的精确对准.This glass disc looks very fragile.这个玻璃盘子看起来很容易碎。The colours rotated round on a disc and were reflected onto the wall behin...
The recent rain had churned up the waterfall into a muddy whirlpool.最近的一场雨把瀑布搅成了泥水漩涡。She was born in the middle of a rain storm.她出生在一场暴风雨中。He stared at the rain spattering on the glass.他凝视着雨点溅落在玻璃上。...
Papain and chymopapain can coagulate soybean protein isolate ( SPI ) , both of them are cysteine proteinases.木瓜凝乳酶和木瓜蛋白酶具有促进大豆蛋白形成凝乳的作用, 同时它们也是巯基蛋白酶.Patients treated with chymopapain recover more quickly and experience m...