- 4570
- 1985-02-02
technology: تحلية المياه
- 4527
- 1984-12-20
- 4525
- 1984-12-18
- 4518
- 1984-12-11
- 4498
- 1984-11-21
- 4459
- 1984-10-13
- 4289
- 1984-04-22
- 4189
- 1984-01-12
- 4153
- 1983-12-05
- 4147
- 1983-11-29
- 4059
- 1983-08-31
- 3933
- 1983-04-25
- 3862
- 1983-02-12
- 3779
- 1982-11-19
- 3764
- 1982-11-04
- 3711
- 1982-09-11
- 3365
- 1981-09-23
- 3364
- 1981-09-22
- 3363
- 1981-09-21
- 3173
- 1981-03-14