# With a specific model
Иран заявил об установлении полного контроля над Ормузским проливом01:09
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（五）政府或者主管部门的行为、检疫限制，或者非因承运人、实际承运人或者其受雇人、代理人原因引起的司法扣押；。im钱包官方下载对此有专业解读
A filled torus (a doughnut) is a 3-manifold homeomorphic to \(S^1 \times D^2\), where \(D^2\) is the 2-dimensional disk. There exists a deformation retract from the doughnut to a circle, so the fundamental group of the doughnut is \(\pi_1(S^1 \times D^2) \cong \mathbb{Z}\).