Frictional forces may also act when there is no relative motion.在无相对运动的情况下,也可以有摩擦力的作用.Viswanathan has analyzed the frictional interaction between fiber fringes.维斯沃纳森分析了纤维须头间的相互摩擦作用.This depends on the estimation of the t...
内部的口袋将是和外部的乙烯基相同的颜色.Inside pockets shall be same color as outer vinyl.为了增强紧凑性,折边的榻榻米周围还布置了乙烯基塑料地板.To advance its tenseness , hemmed tatamis were arranged together with vinyl flooring.以二丙酮醇和丙烯腈为原料,利用简便、温和的反应条件合成新型乙烯基功能单体-...