The ball mill′s rotational speed can only affect the impact force and frequency and has no influence on its separation point between balls and mill wall.
高能球磨机的转速不会影响磨球与磨筒壁的脱离点，只会影响磨球对粉体的撞击力及撞击频率。
The Compositions, structures and properties of medium manganese S. G. iron grinding balls were investigated under conditions of laboratory.
在实验室条件下对中锰球铁磨球的成分、组织和性能进行了试验研究；
Bowling balls have advanced immensely over the past decade alone. Before the 1990's, the only types of bowling balls available were urethane, plastic, and rubber.
保龄球在过去的10年间有了巨大的进步，1990年以前，球的材质仅限于优力胶、玻利及橡胶。
Since the early 1990's, we've seen the introduction of resin balls, reactive resin balls and ultra-reactive particle balls. Now it seems there is a new bowling ball introduced every other day.
1990年初，开始有了胶质球的研发，而后又陆续推出更优质的微粒树脂，时至今日，似乎每天都有新球上市。
According to the major element compositions, three types of balls can be divided:(1)high Fe-Ti balls; (2)S-Fe-Ni balls; (3)light-coloreds.
“熔离小球”按成分可分为3种类型：（1）高铁钛小球；（2）硫铁镍小球；（3）浅色硅铝质小球。
According to the major element compositions, three types of balls can be divided:(1)high Fe-Ti balls; (2)S-Fe-Ni balls; (3)light-coloreds.
“熔离小球”按成分可分为3种类型：（1）高铁钛小球；（2）硫铁镍小球；（3）浅色硅铝质小球。
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