Sentence:  The making of the new <WSD>prototypes</WSD> of the metre and the kilogramme, the tracing of the metres, the comparison of the new <WSD>prototypes</WSD> with those of the Archives, as well as the construction of the auxillary apparatus necessary to these operations, are entrusted to the care of the French section, with the concurrence of the Permanent Committee, ... 
Meaning of the word marked with <WSD> tags:  An original form or object which is a basis for other forms or objects (particularly manufactured items), or for its generalizations and models. (from late 16th c.)