When hoisting any large or heavy equipment off the catwalk always check the Working Load Limit (WLL) of the air winch, or use the travelling block or crane if available.是什么意思_When hoisting any large or heavy equipment off the catwalk always check the Working Load Limit (WLL) of the air winch, or use the travelling block or crane if available.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句