这句话怎么翻译?higher esters than ethyl acetate? 采用固相萃取-气相色谱-质谱联用仪(spme-gc/ms)对啤酒中高级醇和酯类进行检测。 an analytical method was developed to determine higher alcohols and esters in beer by solid-phase microextraction in combination with gas chromatography with mass spectrometry (spme-gc/ms). 本专利描述了比乙酸乙酯更高级酯的详细合成方法 [ ]查看更多
HF line pipe怎么翻译? hp line pipe怎么翻译?hp是什么呢? 结合上下文这里就是高压管线钢管的意思 api 5l 材质x42 规格4" 标准api 5l-2012管线钢管规范 hp coupling 结合表中描述为美标螺纹管箍 螺纹类型为npt螺纹 hp为 high pressure pipe fittings 高压管件的缩写 查看更多