The relation between the days of cion seedling hardening-off, the number of cion leaves, the different explicit hormone processing the interface and the survival rate of graft were investigated.
实验研究了接穗炼苗的天数、接穗叶片数、接口用不同外源激素处理与嫁接成活率的关系。
These are the seedlings that are hardening off in a hotbed.
这些是放在温床中经受耐寒锻炼的幼苗。
Detailed analysis is made of the reasons why fissures, peeling-off, and tooth breaking exist in the build-up welding layer of cast WC for hardening material of steel-toothed gear drills.
在钢齿牙轮钻头强化材料中，详细地分析了铸造碳化钨堆焊层产生龟裂、脱落和断齿的原因。
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