Some problems often occur when using anchor spray support against tunnel landslip. The landslip theory reasons are did analysis in this paper.

就锚喷支护过程中隧道塌方事故时有发生的问题，从理论上对塌方的原因进行了分析。

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Although it has success development different producibility bolt in last few year, concrete spraying research have not the obvious break through in anchor spray support.

虽然近几年来已成功研制了各种可伸长锚杆，但锚喷支护中混凝土喷层研究仍未有明显突破。

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Spray frame, removable handrail, removable foot care, wide seats, folding handle support, solid front, pneumatic rear wheel plastic wheel frame.

喷塑车架，可拆梯扶手，可拆脚托，宽座位，可折支撑把手，实心前轮，塑料轮框充气后轮。

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In the aftermath of the use of pepper spray against seated protestors at the UC Davis campus, Police Chief Anette Spicuzza, according to the Sacramento Bee, explained that the spray was deployed when police officers were cut off from their support.

FORBES: PR and Pepper Spray: What the 99% Can Teach Companies