আমাদের আছে 5052 সেচ পাইপ, সেচ পাইপ, সেচ পাইপ.

1, পৃষ্ঠ ফাটল আছে অনুমতি দেয় না, পৃষ্ঠ ফাটল আছে অনুমতি দেয় না.

2, the surface allows the depth of not more than the location of the wall thickness about nominal size of 8% of the skin, বুদবুদ, surface rough and local mechanical damage, but the maximum depth of defects can not exceed 0.5mm, the total defect area does not exceed the total area of the board 5%.

3, allowing the aluminum supplier along the profile longitudinal lighting to the surface smooth.

4, other requirements: the demand side and the supplier to develop their own.