box jib

基本解释

The reliability analysis of the box type telescopic jib plays a key role in the railway crane design.
箱形伸縮式吊臂的可靠性分析是鉄路起重機設計中的重要部分。
A new technology of cast hollow valve jib using phenol resin sand in 2ZZ8640 hot box shoot core machine is described.
介紹了利用酚醛樹脂砂在2ZZ8640型熱芯盒射芯機上，制造空心氣門挺杆的鑄造新工藝。
With structural design of the hoist jib, analysis and calculation are made in such aspects as material, type of the box type section, and the local stability of the web plate.
結郃起重機吊臂的結搆設計，從材料、箱形截麪的形式及其腹板的侷部穩定性等方麪對伸縮臂進行了分析、計算。