crow foot spanner是什么意思

用法例句

The technological process for forming the claw-shaped cover and the structure of the injection mould are introduced.

介绍了爪形罩的成形工艺及注射模结构,为解决塑件的内外两侧抽芯,外侧采用斜导柱抽芯,内抽芯采用分体型芯,四个爪孔型芯采用出模后专用工具抽芯,提高了塑件的注塑生产效率。

were highly similar in the morphological structure of genitalia with valves,uncus,claspers,sacculus and penis.

对分布于中国的11种秆野螟属(Ostrinia)昆虫雄性外生殖器结构进行了比较分析,秆野螟属昆虫雄性外生殖器由生殖瓣、爪形突、抱器、抱器腹、阳茎组成。