综合色天天久久,WWWらだ天堂中文在线,四十路熟女人妻中出视频,在线免费视频观看你懂的

冠航SKF-A型2t鋁合金手拉葫蘆

全封閉結構防腐蝕、防塵、防水。

對稱排列式同步齒輪，高精度，高韌性。

機械負荷式制動裝置，雙重棘爪彈簧，耐用性，安全性倍增。

限位擋板重物下降時作為停止極限以阻止過低發生的事故。

The body is made of aluminium alloys,antimagnetic,reduce itseld weight.

Total-enclosed cover,anti-corrosion,dust-proof and water-proof.

Symmetric,synchronous gear is high precision and tenacity.

Two spring pawls as the braking system,Make durability and safety doubly.

Position limited plate device can prevent goods to low.