求翻译：前几年国内不能做SGCC的时候，价格比SECC要高很多，现在国内也能做热浸锌板了，所以价格马上拉下来。据我所知，SGCC比SECC大概便宜20％，在同厂同产地的情况下。是什么意思？

In a few years ago can not do time of sgcc, the price is much higher than the secc, now can do the hot-dip zinc plate, so the price is immediately pulled down. Sgcc, as far as I know, probably cheaper than the secc 20% in the same factory with the origin of the case.

Several years ago could not be done within the time SGCC SECC, the price you want to much higher, there are also now able to do the hot dip Zinc plate as soon as the price down. As far as I know, SGCC SECC than about 20% cheaper, and at the same factory with the origin.

Most recent several years home cannot make SGCC time, the price wants Gao Henduo compared to SECC, now domestic also could make the hot dipping zinc plate, therefore the price pulled down immediately.SGCC probably is as far as I know cheaper than SECC 20%, in with factory with in habitat situation.

SGCC China cannot do in previous years when prices much higher than the SECC, domestic hot-dip zinc plates can also do now, the price is down right now. As far as I know, SGCC is cheaper than SECC about 20%, in the case of plant origin.