南极海岸除了一年中来回变动的海冰外，还有长久存在的冰架（就是附着于海岸线，处于半漂浮状态的厚冰层）。
The presence or absence of sea ice affects both ocean surface waters and ice shelves.
这种厚煤层钻孔机2000是不锈钢结构，钻头第一内部腿架的活塞杆和钻孔机支架都是不锈钢的。
The high seam drill 2000 is stainless steel construction and the cylinder rods of the 1st inner legs of the stinger and drill leg are stainless steel.
本公司生产的背景架使用的材料为直径为48 mm，壁厚为3 mm的优质铝合金。
The material of this truss is steel with Aluminum alloy finished, its diameter is 48mm, and the thickness is 3mm.
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