All engines have built-on non-return valves and flame arresters.

所有柴油机都安装有止回阀和防火焰装置。

youdao

Be not, o beloved, slow to return the hallowed flame of his love.

快快回应祂那圣洁的爱焰吧！

youdao

Be not, o beloved, slow to return the hallowed flame of his love.

快快回应祂那圣洁的爱焰吧！

youdao