Perhaps you should try some spelling variations:
"international conference for mechanical science, courses and lectures" » "international conference for mechanism science, courses and lectures", "international conference for clinical science, courses and lectures", "international conference for mechanical stretch, courses and lectures"
"international conference for mechanical science, courses and lecture" » "international conference for mechanism science, courses and lecture", "international conference for clinical science, courses and lecture", "international conference for mechanical stretch, courses and lecture"

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