[机] 胸压钻

[ noun ]
a portable drill with a plate that is pressed against the chest to force the drill point into the work
<noun.artifact>

Drill \Drill\, n.
1. An instrument with an edged or pointed end used for making
holes in hard substances; strictly, a tool that cuts with
its end, by revolving, as in drilling metals, or by a
succession of blows, as in drilling stone; also, a drill
press.

2. (Mil.) The act or exercise of training soldiers in the
military art, as in the manual of arms, in the execution
of evolutions, and the like; hence, diligent and strict
instruction and exercise in the rudiments and methods of
any business; a kind or method of military exercises; as,
infantry drill; battalion drill; artillery drill.

3. Any exercise, physical or mental, enforced with regularity
and by constant repetition; as, a severe drill in Latin
grammar.

4. (Zo["o]l.) A marine gastropod, of several species, which
kills oysters and other bivalves by drilling holes through
the shell. The most destructive kind is {Urosalpinx
cinerea}.

{Bow drill}, {Breast drill}. See under {Bow}, {Breast}.

{Cotter drill}, or {Traverse drill}, a machine tool for
drilling slots.

{Diamond drill}. See under {Diamond}.

{Drill jig}. See under {Jig}.

{Drill pin}, the pin in a lock which enters the hollow stem
of the key.

{Drill sergeant} (Mil.), a noncommissioned officer whose
office it is to instruct soldiers as to their duties, and
to train them to military exercises and evolutions.

{Vertical drill}, a drill press.


Breast \Breast\ (br[e^]st), n. [OE. brest, breost, As.
bre['o]st; akin to Icel. brj[=o]st, Sw. br["o]st, Dan. bryst,
Goth. brusts, OS. briost, D. borst, G. brust.]
1. The fore part of the body, between the neck and the belly;
the chest; as, the breast of a man or of a horse.

2. Either one of the protuberant glands, situated on the
front of the chest or thorax in the female of man and of
some other mammalia, in which milk is secreted for the
nourishment of the young; a mamma; a teat.

My brother, that sucked the breasts of my mother.
--Cant. viii.
1.

3. Anything resembling the human breast, or bosom; the front
or forward part of anything; as, a chimney breast; a plow
breast; the breast of a hill.

Mountains on whose barren breast
The laboring clouds do often rest. --Milton.

4. (Mining)
(a) The face of a coal working.
(b) The front of a furnace.

5. The seat of consciousness; the repository of thought and
self-consciousness, or of secrets; the seat of the
affections and passions; the heart.

He has a loyal breast. --Shak.

6. The power of singing; a musical voice; -- so called,
probably, from the connection of the voice with the lungs,
which lie within the breast. [Obs.]

By my troth, the fool has an excellent breast.
--Shak.

{Breast drill}, a portable drilling machine, provided with a
breastplate, for forcing the drill against the work.

{Breast pang}. See {Angina pectoris}, under {Angina}.

{To make a clean breast}, to disclose the secrets which weigh
upon one; to make full confession.