Warning: file_put_contents(/www/wwwroot/ppbbbu/n94.cn/cache/563e4fa6e89b5314c06965c04d9db363.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/n94.cn/index.php on line 55 penetrant例句_penetrant英汉例句_penetrant双解例句_94生活常识网有道词典
Which of the following characteristics are normally considerde when selecting the type of penetrant to be used in a penetrant test? 滲透試騐中，選擇滲透劑時通常要考慮下列哪些特性？