The development characters of small-nutted longan embryo were studied by paraffin method.
要采用石蜡切片法研究小核龙眼胚胎发育
特点。
The development characters of small-nutted longan embryo were studied by paraffin method.
要采用石蜡切片法研究小核龙眼胚胎发育
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.
文章短芯棒拉拔管材时拉杆
受力,并对拉杆
尺寸设计提供
依据。
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