double actingdouble motiondouble-acting双: two; twin; both; dual动: harness cause disorder stir ...的: 4次方是 The fourth power of 2 i ...双动式, 双作用的, 双动的: double acting双动的, 往复式作用的, 双作用的: doubleacting下载手机词典可随时随地查词查翻译
