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در این روش برای عدم اختلاط خرده‌ سنگ‌های خروجی با ریزش‌های دیواره چاه، خرده سنگ‌ها با فشار هوا و یا آب از فضای بین دو لوله به بیرون رانده شده و تماس با دیواره چاه نخواهند داشت، در مدل دیگری ...

Contribute to chairsineg/ar development by creating an account on GitHub.

Contribute to chairsineg/ar development by creating an account on GitHub.

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Contribute to chairsineg/ar development by creating an account on GitHub.

Contribute to chairsineg/ar development by creating an account on GitHub.

Contribute to chuangzaojz/ar development by creating an account on GitHub.

Contribute to chairsineg/ar development by creating an account on GitHub.

Contribute to chairsineg/ar development by creating an account on GitHub.