当时余心之悲，盖不能以寸管形容之。

Alas! Who would know the indescribable sorrow in my heart?

youdao

端盖用螺栓将它们固定在管板上并加入垫片密封。

Cover is fixing on the tube plate with some sealed gasket by bolt.

youdao

瓶装：铝制或者复合管，配盖，封尾以及兰色测量杯。

Bottle type: Aliminium or Co-ex with cap and seal and blue measuring cup.

youdao

辐射管加热炉的炉壳及炉盖；

The shell and cover of the radiation tube heating furnace.

youdao

当时余心之悲，盖不能以寸管形容之。

Who would know the indescribable sorrow in my heart?

youdao

当时余心之悲，盖不能以寸管形容之。

Who would know the indescribable sorrow in my heart?

youdao