For instance, strain gauges calculate the stretch in the wires or ropes in the rigging and sails.
例如，应变仪计算在索具和船帆内缆线或绳索的长度。
Improvements were made in the design of sails, masts and rigging, and navigational equipment became more sophisticated.
改进了设计的帆，桅杆和索具，和导航设备变得更加复杂。
Improvements were made in the design of sails, masts and rigging, and navigational equipment became more sophisticated.
改进了设计的帆，桅杆和索具，和导航设备变得更加复杂。
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