Warning: file_put_contents(/www/wwwroot/ppbbu/80125.cn/cache/69817eb8ac5be19eb20b77e10f14425d.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/80125.cn/index.php on line 58 low-atomic-number material例句_low-atomic-number material英汉例句_low-atomic-number material双解例句_食材铺反向词典
The density measurement technology of foam material with low atomic number was established by low energy X-ray radioscopy . 采用低能X射线对低原子序数泡沫样品进行透射照相，以胶片作为记录介质，对材料密度进行测量。