1. 对折的：热封的: heat sealed | 对折的:hinged | 透明折盒: Clear Folding Cartons

2. hinged

2. 铰链连接的：hinged valve 关节式阀 | hinged 铰链连接的 | hint 示意

3. 铰链式的：hinged 带有铰链的 | hinged 铰链式的 | hinged-hinged beam 两端铰支梁(端距不变

4. 带有铰链的：hinged watertight door 绞链水密门 | hinged 带有铰链的 | hinged 铰链式的

1. 用铰链连接的
    Something that is hinged is joined to another thing, or joined together, by means of a hinge.

    e.g. The mirror was hinged to a surrounding frame...
           用铰链把镜子和外框连接在一起。
    e.g. The hinged seat lifts up to reveal a useful storage space.
           把用铰链连接的座位抬起来后，就会发现下面有一个实用的储物空间。