| 摘要 |
A support for a mould portion comprises an upwardly-facing recess into which a hook portion of the mould portion is received. The support further comprises a projection which enters a slot in the mould portion to prevent transverse movement thereof. The support also comprises a locking member, movable into an operative position in which it projects over an upwardly-facing surface of the mould portion and prevents upwards movement thereof, and moving means for moving the locking member between its operative position and an out-of-the-way position thereof. |
