进行了黄瓜单（双单）倍体染色体加倍试验。
The chromosome doubling of haploid and double haploid in cucumber was studied.
结构特点：1、采用平衡双阀座系统，加倍增大流量面积、获得特大排水量。
Structures: 1, tow balanced valve bases to increase the area of flux and acquire large amount of water discharged.
断奶对体重的加倍次数影响极大，单羔体重受到的影响最大、双羔次之、多羔较小。
The doubled body weight of lamb were greatly influenced by weaning especially the single lamb was most obviously, twin was secondly and then multiparous lamb was.
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