open top riser 明冒口
top-riser 顶冒口
Top Tension Riser 立管 ; 顶部张紧立管
Top Tensioned Riser 立管 ; 顶张式立管
Top tentioned riser 顶端张紧立管
top tensioned drilling riser 顶部张紧钻井隔水管
There is abnormal bottom shrinkage in Zn Al alloy castings and top riser has little effect on them.
锌铝系合金铸造时出现反常的底部缩孔，而用一般上置式冒口对此类缩孔的补缩效果甚微。
The top riser vent with big mesh size has excellent ventilation. It also effectively guard against flies.
上方大网目透气网孔，通透气佳，即可有效预防苍蝇入侵。
In accordance with proportional solidification principle and limited feeding method, a series of top riser size is recommended to heavy castings.
本文根据均衡凝固原则、有限补缩的方法，推荐了厚大铸铁件的顶冒口尺寸系列。
应用推荐