打击法 meaning in English

beating
hammering
pounding

It introduces the methods of making stone tools , including direct and indirect freehand flaking , anvil and bi - polar techniques . the usage of the tools is also mentioned
介绍石器的用途及制造石器的方法，如直接打击法、摔击法、两极法和间接打击法。
Soil quality - gas chromatographic determination of the content of volatile aromatic hydrocarbons , naphthalene and volatile halogenated hydrocarbons - purge - and - trap method with thermal desorption
土质.挥发性芳香烃类物质萘和挥发性卤化烃含量的气相色谱分析测定.有热解吸作用的洗涤和打击法