sa （single action）single action （sa）单: singular number fate; destin ...动: harness cause disorder stir ...模式: model; mode; pattern; type; ...单动模: single acting die单动模具: single action die; single-action die下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:单动模式，即可在微信中查询翻译
