invalid labor contracts meaning in English

无效劳动合同

A theoretic breakthrough of contract law effected by invalid labor contract system
兼谈无效劳动合同与无效民事合同的区别
If because servantchoose a person for a job , the reason of the unit did not conclude , work contract , or conclude invalid labor contract , cause losing of pay of laborer inductrial injury , medical treatment , divide outside providing treatment of inductrial injury , medical treatment for laborer by national regulation , still should pay laborer to be equivalent to medical treatment expending the damage of 25 % to use
假如由于用人单位的原因没有订立劳动合同，或订立无效劳动合同，造成劳动者工伤、医疗待遇损失的，除按国家规定为劳动者提供工伤、医疗待遇外，还应支付劳动者相当于医疗费25 %的赔偿费用。