| http://www.w3.org/ns/prov#value | - Known machines of the above type have several drawbacks, mainly due to the presence of the push rods, which prevent free access to the mold, thus complicating maintenance and replacements; transmit externally, i.e. on to the frame, both the forces applied to the half-molds and the forces generated inside the mold, so that relatively strong, high-cost frames must be used; and call for an extremely
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