求翻译：在中温条件下（最高180°）：润滑脂易挥发，其挥发速度由链速、链条张紧力、载荷及最高温度决定，通常每三个月加一次脂，每次约2克（空间充满度75%）。是什么意思？

The temperature conditions (up to 180 °): volatile grease, its evaporation rate determined by the chain speed, chain tension, the load and the maximum temperature, usually every three months plus fat, each about 2 g (space is full degrees 75%).

In the temperature conditions (up to 180 ° ): grease volatile, its evaporation speed by link speed, chain tension, load and temperature, usually every 3 months and a fat, about 2 grams each time (space 75% full scale).

Under warm condition (highest 180°): The lubricant easy to volatilize, its volatility speed by the chain fast, the chain link tensioning force, the load and the maximum temperature decided, usual every three month Canada fat, each time approximately 2 grams (spatial fullness 75%).

Under the conditions of temperature (up to 180 °): grease volatile, its volatile speed chain chain tension, load speed, and maximum temperature decision, usually every three months plus fat, each about 2 grams (space filled with a 75%).