| 摘要 |
<p>The thermoplastic material tank is for use as a single or a battery tank for storing heating oil. The tank has recesses to reinforce its walls. The tank (10) has on its opposite side walls (11, 12) at least one horizontal groove recess (17) which at least in part is cylindrically formed. Both side walls (11) of the tank are provided with two or more parallel and horizontal groove recesses (17) with cylindrically formed bottom surfaces (18). The top recess is positioned in the middle of the tank height and the other recess is positioned some distance below the first recess.</p> |
