flat back die扇形: fan-shaped模: mould; pattern; matrix扇形模头: fan die; fan-shaped die霍伊特扇形模式: hoyt's sector theory霍伊特楔形模式;霍伊特扇形模式: hoyt' ectortheory; hoyt's sector theory下载手机词典可随时随地查词查翻译