The development characters of small-nutted longan embryo were studied by paraffin method.
摘要采用石蜡切片法研究小核龙眼胚胎发育的特点。
The development characters of small-nutted longan embryo were studied by paraffin method.
摘要采用石蜡切片法研究小核龙眼胚胎发育的特点。
The mechanical status of nutted rod in drawing pipe with short mandrel rod is analyzed, the analysis basis for the dimensions design of nutted rod offered.
文章分析短芯棒拉拔管材时拉杆的受力,并对拉杆的尺寸设计提供分析的。
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