The retainer device has a channel (11), cross member (16), and a central bore restrainer locking plate (17) wherein a bore restrainer of chain and hook (19) has the hook attached at central position (6) and the chain attached to the locking plate (17).

If the lock variable (LOCK) as read has a non-lock state of '0', then the CPU can acquire a lock.

The connection (20) comprises two male locking strips (21), and a central female locking strip (23).

The lock spring is provided with a center section, a lock section, a contact section, and a connection section.

Pinpoint pole is fixed in the center mooring base of the locking trunk.

The lock element may be a planar disk having a central aperture.

The locking means (30) comprises a locking bolt (87) with a central, narrowed portion (87b) and broad shoulder portions (87a) at each end of the locking bolt.

The base also has built in a locking means which is activated by a CPU.

Each of the locking pieces has an inner center having a rotation center protrusion.

Particularly preferred is when interlocking between the core and the sheath is introduced.

A distribution transformer having an interlocking core frame is provided.

The retainer device has a channel (11), cross member (16), and a central bore restrainer locking plate (17) wherein a bore restrainer of chain and hook (19) has the hook attached at central position (6) and the chain attached to the locking plate (17).

The invention relates to a locking device with a key-activated cylinder core (10) which when turned, performs various locking functions.

The locking device is disposed in a center in a longitudinal direction of a guide rail.

A locking fastener is inserted through the central aperture of the plate member and into the locking member to thereby lock the spinal fusion device in position.