Summer is a splendid season... you need something colorful to decorate yourself... How about a handmade flower ring.
夏天是个缤纷的季节…你需要有些五彩缤纷的东西来装饰自己…那么做件手工的花朵戒指怎么样?
But at the end of the summer 1991, an alarm bell started to ring, discrediting the phenomenon.
但是在1991年夏末,一个打扰警铃开始响起,有了不信怀疑的现象。
Water-ring vacuum pump usually gets steam-erosion in summer due to high temperature of working-water, which affects its safe and steady operation.
水环式真空泵在夏季往往因工作水温度高发生汽蚀,影响设备安全稳定运行。
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