This representation method should be more common abroad and is used to indicate whether the thread is an external thread or an internal thread. f: female, in drawings or samples of threads or joints, it means female thread or internal thread; m: male, it means male thread or external thread. p stands for. Female animals are those that produce ova, which are fertilized by the spermatozoa of males. The main difference between females and males is that females bear the offspring — and that.
Who was first female rapper?
Zhihu, a high-quality Q&A community on the Chinese Internet and an original content platform where creators gather, was officially launched in January 2011 with the brand mission of "allowing people to better share knowledge, experience and insights, and find their own answers." Zhihu relies on seriousness and professionalism.
