“pine tar”的概念、定义、翻译、参考文献-科学参考

单词	pine tar
释义	pine tar [`pīn ´tär] ^MATERIALS A viscous black mass obtained as a by-product in the distillation of pine wood; used for roofing.
随便看	crosscutting relationships cross drum boiler crossed belt crossed cylinder crossed electrophoresis crossed-field accelerator crossed-field amplifier crossed-field backward-wave oscillator crossed-field device crossed-field multiplier phototube crossed lens crossed-needle meter crossed paralysis crossed-pointer indicator crossed prisms cross effect cross-eye cross-fade cross fault cross-fertilization cross fire cross-flow cross-flow baffle cross-flow plane cross flux

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