throat brace

直角三角形_馆档网 ... "喉"," throat" "喉部拉条"," throat brace" "喉深(熔接)"," throat depth" ...

brace的翻译中文意思... ... tension brace 拉紧牵条, 拉撑 throat brace 喉撑 tie or brace for heel of switches 尖轨跟部轨撑 ...