bottom dead center

基本解釋

The stroke is the distance the piston travels from BDC (Bottom dead center) to TDC(top dead center).
行程是活塞從下止點(diǎn)運(yùn)行到上止點(diǎn)的距離。
BDC (bottom dead center) ― the position of the crank and piston when the piston is nearest to the crankshaft.
（下止點(diǎn)） - 當(dāng)活塞離曲軸最近時(shí)，曲柄和活塞的位置。
The Bore is the diameter of the cylinder. The stroke is the distance the piston travels from BDC (Bottom dead center ) to TDC(top dead center). The Bore is always mentioned first.
內(nèi)徑指的是氣缸的直徑；行程是活塞從下止點(diǎn)運(yùn)行到上止點(diǎn)的距離。表述時(shí)，內(nèi)徑總是寫在前面。

bottom m dead center 下死點(diǎn)
before bottom dead center 在下止點(diǎn)前;下死點(diǎn)前;下止點(diǎn)前;襯底式變換器
ABDCafter bottom dead center 在下止點(diǎn)后
after bottom dead center 在下止點(diǎn)后;下死點(diǎn)后在下止點(diǎn)后;下止點(diǎn)后;在下死點(diǎn)后
r Bottom Dead Center 在下止點(diǎn)后