arch piece造句

• Copyrighted in 1974 by Reiss Games, Inc ., it consists of 6 closed arch pieces, 5 of which have pegs on their straight center.
• The stonework hitherto has proved something of a check upon the rate of progress, chiefly because of the scarcity of masons, and the enormous amount of work that is necessary to prepare some of the arch pieces . " The building at this time had only fifteen workers actually employed on construction, six of them being masons.