请教以下专业名词的英语译法法：
封板、锥头、套筒（无纹螺母）、螺钉、高强度螺栓、螺栓球、焊接空心球、杆件

封板:blanking plate
锥头:conule
套筒:sleeve
螺钉:screw
高强度螺栓:high-strength bolt

杆件 member
焊接球节点 Welded joints of space grid structures
螺栓球节点 Bolted joints of space grid structures

"封板"应为:closing board
"焊接空心球节点"应为welded hollow spherical joint
"焊接空心球"welded hollow sphere
"螺栓球节点"应为:bolted spherical joint
"螺栓球"bolt sphere