الوصف

Internal gear introduction

Internal gear within the tip surface and tooth surface of gear, gear, the inner gearcircle. Usually internal gear mechanism, gear ring gear internal gear.

Shandong China Coal Industrial&Mining Supplies Group Co.,Ltd (hereinafter referred to as china coal) is a group company, which is a collection of e-commerce, machinery manufacturing, software, research and development, modern logistics of large diversified industrial group. The group has **0 million yuan registered capital , with more than ***0 employees.

China coal is a professional manufacturing base of mines support equipment, transport equipment, lifting equipment, spray equipment, drilling equipment, ventilation equipment, lifting equipment and other products, as well as research and development new product and mine construction products with advanced high technology.