| 摘要 |
<p>An X-ray radiograph apparatus with a top board (2) furnished with a pair of guide grooves (3) designed to allow fitting of a footstool by the guide grooves (3) and also allow fitting of an extension top board (8) by the guide grooves (3). In the apparatus, a pair of heads (10) are combined with a pair of rotary shafts. Each of the heads (10) is fitted to an inferior end of the respective rotary shaft. Upon abuttal of an extension top board (8) on the terminal edge of a top board (2), the heads (10) are inserted in the guide grooves (3) from openings (4) thereof and securely fitted in the interiors of the guide grooves (3). Thereafter, the rotary shafts and heads (10) are rotated by rotational operating means (12). The rotary shafts and heads (10) are rotated to an extent of 90°.</p> |
