三角头 meaning in English

triangle-head
triangular-head
trigonocephaly

Railway fixed equipment . triangle head bolts
铁路固定设备.三角头螺栓
Triangular nuts for use with electrical equipment in mining
矿山预防潜在性爆炸气体的电气设备.三角头螺母
James : you ' re not friends with that red , pyramid thing , are you
詹姆斯：你和那些红色三角头不是一伙的，是吗？
Electrical apparatus for potentially explosive atmospheres for mining ; triangle head bolts
矿山预防潜在性爆炸气体的电气设备.三角头螺栓
Electrical apparatus for potentially explosive atmospheres in mining ; triangular head bolts ; safety requirements and testing
采矿用于预防潜在爆炸环境爆的电气设备.三角头螺栓