Every sampling unit can be certain length , also can be unit of particular area , bulk or cubage , quality or quantum of time 每个取样单位可以是一定长度,也可以是一定面积、体积或容积、质量单位或时间单位等。
Notification letter explaining the purpose of the survey and soliciting cooperation will be mailed to the sampled units beforehand 被选中的单位会预先收到邮寄通知书,解释该统计调查的目的以及请求受访者合作。
Fertilizers - sampling - recommendations for minimum mass of increment of a solid fertilizer to be taken to be representative of the total sampling unit 肥料.第2部分:取样.第7节:代表全部样品的固体肥料最小体积增量推荐标准
During the fieldwork period , an enumerator carrying hisher enumerator identity card issued by the planning department will visit the sampled units 在外勤工作期间,访问员会带备由规划署发出的访问员身分证,到访被选的单位进行访问。
Notification letter explaining the purpose of the survey and soliciting cooperation will be mailed to the sampled units in private residential buildings beforehand 被选中的私人屋宇单位会预先收到邮寄通知书,解释该统计调查的目的以及请求受访者合作。