大家都搜：
防护等级；保护级别；密封等级
1、provide protection───提供保护
2、protection cover───[电]保护罩
3、projectile protection───投射物防禦
4、cross protection───交叉保护作用；防止碰线，防止混线
5、protection against───保护；防护
6、protection───n.保护；防卫；护照
7、focused protection───集中防护
8、livestock protection───牲畜保护
9、copyright protection───[计] 版权保护
1、Practice and exploration of teaching reform of health protection class in university───高校保健课教学改革的实践与探索
2、Volunteer service: charity performance, environmental protection class and others.───志工体验课程：慈善义演，环保等等。
3、These transmitters have a robust vibration-proof stainless steel sheath with IP65 protection class.───该类变送器具有防震的不锈钢外罩，外罩达到IP65保护等级。
4、All vibration motors comply with protection class IP65 against contact, dust and water splashes.───所有的振动电机符合防护等级IP65防接触，灰尘和水溅。
5、The housing made of resistant plastic material, reinforced by fiberglass has protection class IP 65.───外壳采用抗腐蚀塑料材料，用纤维玻璃加固，防护等级为IP65。
6、The motor coating meets the stringent requirements of corrosion protection class C5-M high.───马达涂层满足防腐蚀类C5-M高的严格要求。
7、Trait: with urgent stop switch and reinforced brekeaking switch with position limit, Protection class up to IP54 , . . .───特点：带急停开关及强制断开限位开关，防护等级IP54，带热保护装置。
8、Besides the Protection class of servo motor is IP65. it can be used in Harsh environment safely.───另外伺服电机防护等级为IP 在恶劣环境下可以更安4、使用。
9、Protection class: IP68 is available, and the sensor can sink into the water.───防护等级：等级IP68可用，该传感器可以沉入水中。
1、The joint of shell and cover is the for of devious - labyrinthian struture, insuring preferable protection class.
2、Motor protection class is IP 54, F class insulation and equipped with overload protection equipment.
3、Delicate and nice exterior appearance, compact and reasonable structure, F class motor insulation grade , protection class is IP54, uplift whole performance of electric hoist.