导柱外表面自上而下呈与弧形内凸头配合的波浪状。
The outer surface of the guide post is in a wavy shape matched with the arc-shaped inner concave head form top to bottom.
施肥箱下方的下肥道内贯穿有控制杆，上端设有凸头，达接在施肥箱内的出口上。
A control lever runs through a lower fertilizer passage below the fertilization box, with the upper end provided with a raised head which reaches an exit inside the fertilization box.
该探针包括涡流线圈，以及支撑装置，该支撑装置用于承载 具有适于将涡流引入正好位于凸头紧固件之下的材料中的定向的所述线圈。
The probe comprises an eddy current coil and a support means for carrying the coil in an orientation suitable for introducing eddy currents into material directly beneath a raised-head fastener.
应用推荐