expansion sleeve bolt胀壳式锚杆;撑帽式杆柱
expansion n bolt膨胀螺栓
expansion-bolt扩开螺栓
Expansion Anchor Bolt膨胀螺栓
thermal expansion die bolt热膨胀螺栓
wedge-nut expansion shell bolt楔胀式锚栓
expansion type roof bolt膨胀式锚杆
expansion type anchor bolt涨壳式锚杆
Brand Metal Expansion Bolt牌金属膨胀螺栓
N（名词） a bolt that expands on tightening, enabling it to be secured into an unthreaded hole 伸缩栓