stem head meaning in English

首柱上端
首柱头

Dimension of valve stem head
阀杆头部尺寸
Low stem head in wedge cavity reduces height and weight of valve . design pioneered by velan
楔腔内的低阀杆头，降低了阀门的高度，减少了阀门的重量。这些结构设计也是由velan首创。
The taper stem head then transfers a vertical closing force to a lateral force which positively seats the knife against the seat face
然后锥形阀杆头将垂直关闭力转换成侧向力，将闸刀放置到阀座表面上。
Mediterranean biennial herb with long - stemmed heads of purple ray flowers and milky sap and long edible root ; naturalized throughout united states
地中海两年生草本植物，有长茎的紫色舌状花、乳白色树汁和可食用根；已被美国广泛种植。
Unlike any other design , the stem head slides inside a circular cavity on the stem guides in the body and bonnet , and is connected to the knife blade by a taper slot
与其它结构不同，这种阀门的阀杆头部在圆形空腔内滑动，由阀体和阀帽内部引导运动，通过锥形槽连接到闸刀上。