ground contact closure是什么意思，ground contact closure的翻译，ground contact closure音标、读音、用法和例句

Warning: file_put_contents(): Only 0 of 6357 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/totle.com.cn/index.php on line 55
ground contact closure是什么意思，ground contact closure的翻译，ground contact closure音标、读音、用法和例句_乐豆毛深蓝词典