A vomere is the blade part of a plough, the molazza is a stone mill piece otherwise known as a muller or a pan mill but how the two go together defeats me: i presume it describes a process by which the ploughshare is either sharpened or actually produced.

That's the best I can do.

Nicholas

I think molazza in this case means concrete mixer, the vomere is the blade or paddle that actually mixes the mortar.

millstone

Either of two flat, round stones used for grinding grain to make flour. The stationary bottom stone is carved with shallow grooved channels that radiate from the centre. The upper stone rotates horizontally, and has a central hole through which grain is poured. The channels of the bottom stone lead the grain onto the flat grinding section, called the land, and to the edge, where it emerges as flour. The best millstones are made from French buhrstone, quarried near Paris. In the U.S., quartz conglomerate, quartzite, sandstone, or granite is used. Stone-ground flour accounts for only a small proportion of milled flour today.



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Note added at 19 hrs (2007-02-25 15:18:55 GMT)
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[steel] grinders of a millstone

http://www.architettoinrete.it/Web_glossarioAlfabeto.asp?Hea...

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Note added at 19 hrs (2007-02-25 15:19:53 GMT)
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Grain mills
Mills with steel grinders work on the cut-and-rub principle used by the old ... A millstone works by peeling the seeds from the outside and then gently ...
www.hawos.de/pages/engl/alles6.htm

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Note added at 19 hrs (2007-02-25 15:21:39 GMT)
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Taos Roasters - Brewing Recommendations
The next oldest is the millstone, updated to steel burrs or corrugated plates. The next is the roller mill, which is used only in giant commercial grinders. ...
www.taosroasters.com/brewing.html