|
| 1975 |
On November 20
,
|
| On September 18
,
On September 18, signed an agreement for basic design of PTA plant with McKee Engineering Company
|
| |
| 1976 |
On July 23
,
|
| On July 26
,
|
| On December 14
,
|
| |
| 1977 |
On January 29
,
|
| On April 13
,
|
| |
|
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13
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