These valuable materials and works, Which are being conserved on various magnetic tapes by means of the simulated magnetic recording, are subjected to serious physical and chemical inroads.

• 这些大量的、珍贵的音像资料及影视作品,目前正以模拟磁记录方式被保存于各种磁带中,遭受着严重的物理的、化学的侵害。