ຜົນການຊອກຫາ

thong bottoms). The tan lines created by the wearing of a bikini while tanning are known as a bikini tan. A 1969 innovation of tan-through swimwear uses...

{\displaystyle c} , and friction σ {\displaystyle \sigma \,\!} tan ⁡ ( ϕ ) {\displaystyle \tan(\phi \,\!)} , where σ {\displaystyle \sigma \,\!} is the normal...