马克•藏伯格：地震仪的基本模型是一个箱体，箱内装置弹簧，弹簧上悬挂重物，地震来临时，重物在竖直方向上振动。
Mark Zumberge: Basically a seismometer is a box with a spring with a mass hanging inside, and as the ground shakes the mass goes up and down.
其中高拉杆机构拉悬挂的重物改设成拉弹簧以增加安全性，踢腿机构和卧推架机构都是栓挂哑铃片或者是杆铃片。
Among them high bars, a weight of institutions to suspension set to pull to increase the safety of spring, kick institutions and lie push frame agencies are bolts of hang dumbbell or stem of the bell.
其中高拉杆机构拉悬挂的重物改设成拉弹簧以增加安全性，踢腿机构和卧推架机构都是栓挂哑铃片或者是杆铃片。
Among them high bars, a weight of institutions to suspension set to pull to increase the safety of spring, kick institutions and lie push frame agencies are bolts of hang dumbbell or stem of the bell.
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