perforators

They belong to that species of molluscous perforators which excavate holes in the hardest stone; their shell is rounded at both ends, a feature which is not remarked in the common mussel.

The Mysterious Island 2005

They belong to that species of molluscous perforators which excavate holes in the hardest stone; their shell is rounded at both ends, a feature which is not remarked in the common mussel.

The Mysterious Island 2005

A microdrill close up; tiny flint perforators apparently for bead making.

Interactive Dig Hierakonpolis - Hierakonpolis 2009 - Field Note 3 2002

We shall also have a very large number of perforators to drill extraction and immersion wells.

CASTRO SPEAKS AT INRA-DAP MERGER 1969

The chief perforators of flowers, in this part of the continent at least, appear to be some kinds of humble bees (Bombus) and carpenter bees (Xylocopa).

Scientific American Supplement, No. 841, February 13, 1892 Various

But it is particularly from the character of the head that the amateur observer of the perforators may soon learn to distinguish between a Xylocopa and a Bombus as they work among the flowers.

Scientific American Supplement, No. 841, February 13, 1892 Various

Separate file binders and perforators for the lessons, each cover holding some 300 pages, may be obtained at the nominal cost of about 50 cents each; one of these will be delivered free with the first lesson.

Valere Aude Dare to Be Healthy, Or, The Light of Physical Regeneration Louis Dechmann

Knives, arrow-points and perforators of chipped stone are found in all parts of the continent.

Marvels of Modern Science Paul Severing

Perforating is only practiced by a small number of species of insects, and many but not all of the perforators do so because their tongues are too short to reach the nectar by entering the flower.

Scientific American Supplement, No. 841, February 13, 1892 Various

But Edison's work on the automatic did not stop with this basic suggestion, for he took up and perfected the mechanical construction of the instruments, as well as the perforators, and also suggested numerous electrosensitive chemicals for the receivers, so that the automatic telegraph, almost entirely by reason of his individual work, was placed on a plane of commercial practicability.

Edison, His Life and Inventions, vol. 1 1910