long plunger 长柱塞
Nozzle, gooes neck, injection plunger head and melting pot sleeve are made from hot work steel from Germany, so their life spans are long.
射咀、鹅头、压射头及料壶司筒采用德国优质热作钢制造，使用用寿命长；
The cylinders are made of super-hard metal(plunger hardness above HRC55), and sealed with low-resistance stepped gaskets, giving no oil-leakage, long service life and low maintenance cost.
液压缸采用特殊超硬材料，柱塞硬度达HRC55以上，密封采用低阴力阶梯圈，无漏油，使用寿命长，保养成本低；
If pole and take a long plunger with the use of each other, can constitute arbitrary high degree of scaffolding.
若将立杆和顶杆相互配合接长使用，就可构成任意高度的脚手架。
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