Warning: file_put_contents(): Only 0 of 4647 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/80125.cn/index.php on line 58 penetrant例句_penetrant英汉例句_penetrant双解例句_食材铺反向词典
Which of the following characteristics are normally considerde when selecting the type of penetrant to be used in a penetrant test? 渗透试验中，选择渗透剂时通常要考虑下列哪些特性？