| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve problems such that a large amount of labor is required for performing fine room temperature control by a manual opening and closing type ceiling window for a green house and also a large cost is required for newly installing an automatic ceiling window. <P>SOLUTION: This attachment for converting the ceiling window for the green house (a wire rope-pulling type manual opening and closing type) to an electric powered automatically opening and closing type is provided. <P>COPYRIGHT: (C)2008,JPO&INPIT |
