tachometer
n . 转速计,流速计
转速计,流速计
tachometer 转速计
tachometer *转速计
tachometer n 1 :
measuring instrument for indicating speed of rotation [
synonym :
{
tachometer }, {
tach }]
Hydrometer \
Hy *
drom "
e *
ter \,
n . [
Hydro -,
1 -
meter :
cf .
F .
hydrom [`
e ]
tre .]
1 . (
Physics )
An instrument for determining the specific gravities of liquids ,
and thence the strength spirituous liquors ,
saline solutions ,
etc .
[
1913 Webster ]
Note :
It is usually made of glass with a graduated stem ,
and indicates the specific gravity of a liquid by the depth to which it sinks in it ,
the zero of the scale marking the depth to which it sinks in pure water .
Extra weights are sometimes used to adapt the scale to liquids of different densities .
[
1913 Webster ]
2 .
An instrument ,
variously constructed ,
used for measuring the velocity or discharge of water ,
as in rivers ,
from reservoirs ,
etc .,
and called by various specific names according to its construction or use ,
as {
tachometer },
{
rheometer }, {
hydrometer }, {
pendulum },
etc .;
a current gauge .
Hydrometric
Tachometer \
Ta *
chom "
e *
ter \,
n . [
Gr .
ta `
chos swiftness ,
speed (
fr .
tachy `
s quick ) -
meter :
cf .
F .
tachom [`
e ]
tre .]
An instrument for measuring the velocity ,
or indicating changes in the velocity ,
of a moving body or substance .
Specifically :
[
1913 Webster ]
(
a )
An instrument for measuring the velocity of running water in a river or canal ,
consisting of a wheel with inclined vanes ,
which is turned by the current .
The rotations of the wheel are recorded by clockwork .
[
1913 Webster ]
(
b )
An instrument for showing at any moment the speed of a revolving shaft ,
consisting of a delicate revolving conical pendulum which is driven by the shaft ,
and the action of which by change of speed moves a pointer which indicates the speed on a graduated dial .
[
1913 Webster ]
(
c ) (
Physiol .)
An instrument for measuring the velocity of the blood ;
a haematachometer .
[
1913 Webster ]
安装中文字典英文字典查询工具! 中文字典英文字典工具:
复制到剪贴板
英文字典中文字典相关资料: