The most suitable thinner might was silicone oil , other thinner minght cause the contraction of mould .
探讨了稀释剂用量与种类对硅橡胶模具质量的影响,并指出二甲基硅油是合适的稀释剂;
Why should child labor be abolished ? Are there cases in which child labor minght be tolerated ?
为什么要取乐童工?是否有一些特殊的情况可以容忍童工的存在?