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lead rails
rails铅
常用释义
rails铅
例句
全部
Sewing-machine
oil
should be
added
to
the
movable
hardware
components
such as
door
hinges
or
lead
rails
to
keep
them
flexible
.
门铰链或导轨等活动五金配件应定期适当添加缝纫机油，保持灵活；
the
lower
end of
lifting
leading
screws
(
4
)
are
fixed
on
the
vertical
moving
sliding
blocks
and
the
horizontal
lead
rails
(
2
);
升降丝杠（4）下端固定在垂直移动滑块及水平导轨（2）上；