与六千辛A相比，731A开花持续天数较短，开颖角度较小，柱头外露率低，开闭时间略长。
Compared with Liuqianxin A, 731A has a shorter period of flowering days, a smaller angle of glume opening and a longer glume opening time.
其次，这个展览何时举行？每天开闭馆时间是几点？
Secondly, what are the dates between which the exhibition will be held, and what are the daily opening hours?
输送阀门的自动开闭操作使工人在全部工作时间内都能处在危险品灌装点的安全距离之外。
Automated opening and closing of transfer valves keep workers a safe distance away from hazardous ladings at all times.
输送阀门的自动开闭操作使工人在全部工作时间内都能处在危险品灌装点的安全距离之外。
Automated opening and closing of transfer valves keep workers a safe distance away from hazardous ladings at all times.
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