discharge check ball 出口止回球
limit check ball 限制阀球
intake check ball 进口止回球
ball check valve 落球式止回阀 ; [机] 球形止回阀 ; 止回球阀 ; [机] 球形单向阀
Check-ball valve 止回球阀
ball check 球形单向阀 ; 球形阀 ; 球阀
spring ball check valve 弹簧球式止回阀 ; 弹簧球式
Dinging ball check 钢球敲击检查 ; 钢球敲击查抄
The French Open is the only major event that doesn't use the video technology because officials can check ball marks left on the clay surface.
法网是唯一不采用录像技术的大满贯赛事,因为裁判可以在土场上检查球印。
After Frank came back from his ball game, he went to check how his brother's plan turned out.
弗兰克打完球赛回来后,就去看了他哥哥的计划结果如何。
“Most of our kids can’t spell without spell check or add unless it comes up on the computer, ” said Karol Ball, 51, who has two teenage sons in the Atlantic City district.
“在没有电脑拼写检查的时候,大部分的孩子们都不能准确地拼出单词来,”两个在亚特兰大校区上学的男孩的母亲、51岁的卡罗尔·波尔说。
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