Alloy steel, completely welded, oil-proof, waterproof and anti-corrosive gas and medium, suitable for all kinds of environments.
合金钢材料，全密封焊接，防油、防水、防一般腐蚀性气体及介质，可适用于各种环境。
2
Alloy steel construction, welded with bellow, potted by adhesive inside, oil-proof, waterproof and anti-corrosive gas and medium making it suitable for all kinds of environments.
合金钢材料，波纹管焊接，内部灌胶密封，防油、防水、耐腐蚀，可适用于各种环境。
3
Balanced formula to make oil with good anti-corrosive and anti-rust properties.